The mission, Cygnus NG-21, is the space agency’s 21st commercial ISS resupply mission using the uncrewed Cygnus capsule built by contractor Northrop Grumman, which took over the spacecraft’s development after acquiring manufacturer Orbital ATK in 2018.

Cygnus spacecraft have completed nine missions under the company’s Commercial Resupply Services Phase 2 (CRS-2) contract with NASA and are scheduled for missions through 2026 after the agreement was extended in 2022. The total value of the CRS-2 contracts, which were also awarded to SpaceX and Sierra Space, is capped at $14 billion.

Cygnus’ 21st flight is targeted to launch at 11:28 a.m. EDT on Saturday from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida. The spacecraft is called the S.S. Richard “Dick” Scobee in honor of the astronaut who died while commanding the Space Shuttle Challenger.

Cygnus will arrive at the orbital laboratory on Monday, where NASA astronaut Matthew Dominick will use the ISS’ robotic arm to capture it with NASA astronaut Jeanette Epps serving as backup.

Carrying more than 8,200 pounds of supplies, the uncrewed spacecraft will launch atop SpaceX’s reusable Falcon 9 rocket for the second time after Northrop Grumman’s supply of Antares rockets, which rely on parts from Russia and Ukraine, was exhausted.

After docking to the ISS for six months, the expendable capsule in January will depart the space station and burn up in Earth’s atmosphere.

NASA will host a prelaunch media session on Friday followed by launch coverage on Saturday and arrival coverage on Monday, all of which will be on the agency’s website, app, and YouTube channel.

The Cygnus capsule will carry research materials that will directly support experiments under NASA’s ISS Expeditions 71 and 72.

One test, for example, will use a penny, hex nut, and balloons to demonstrate centripetal force in microgravity. Researchers will also use special machines to produce human tissue and stem cells, test the effects of spaceflight on DNA, and study the movement of gas and liquid through a filter in zero gravity.

In total, the spacecraft will carry nearly 2,800 pounds worth of materials for scientific investigations, as well as 95 pounds worth of spacewalk equipment and two CubeSat satellites to be deployed from the ISS.

Cygnus spacecraft so far have delivered more than 138,000 pounds of equipment, science experiments, and supplies to the space station, according to Northrop Grumman.

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Boeing’s CST-100 Starliner—a semireusable spacecraft under a multibillion-dollar contract with NASA for Commercial Crew rotation missions to the ISS—underwent a hot fire test on Saturday intended to evaluate the capsule’s reaction control system (RCS) thrusters. The vessel is in the midst of its crewed flight test (CFT), which is intended to be its final mission before NASA certifies it for service.

On its way to the orbital laboratory, five of Starliner’s RCS thrusters failed to perform as expected, which, coupled with a series of helium leaks, has led NASA and Boeing to keep the spacecraft at the ISS for further testing both on the ground and in orbit. The issues are traced to the spacecraft’s service module, which, unlike the semireusable crew module, will be jettisoned and lost at the end of the mission.

Starliner had already undergone one on-orbit hot fire test in June. According to Steve Stich, manager of NASA’s Commercial Crew program, all thrusters, except for one which has been shut down, performed at 80 to 100 percent during that test. Stich in July said the space agency continues to hold that assessment.

However, it appears the test was not satisfactory for NASA and Boeing, which last month began hot fire ground testing at White Sands Test Facility Test Facility in New Mexico. The campaign is using an identical thruster to recreate the cadence of Starliner’s thrusters during its docking with the ISS, which engineers believe is the maneuver that caused the issue.

As part of those evaluations, officials suggested there could be a second hot fire test of Starliner on orbit, which came to fruition Saturday. With Wilmore and Williams inside the spacecraft, teams fired 27 of the service module’s 28 RCS thrusters one at a time.

The test showed that all thrusters are back to preflight levels, firing at 97 to 102 percent of peak thrust according to Boeing. In addition, engineers confirmed that helium leak rates remain stable and that the spacecraft has more than enough fuel for its return trip.

Boeing predicted that a flight test readiness review will take place by the end of this week, following which teams will select a return date. Wilmore and Williams will also participate in two undocking simulations during the week in preparation for their homecoming.

The astronauts in July gave their first Earth-to-orbit update since arriving at the ISS, saying they are in good spirits and have been in contact with their families.

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The approval will allow SpaceX to stay on schedule with its Crew-9 mission to rotate astronauts at the International Space Station (ISS), which NASA officials on Friday said is planned for no earlier than August 18.

Falcon 9 was grounded by the FAA following a rare mishap during a July 11 launch of Starlink satellites, its first failure after a streak of more than 300 successful missions.

SpaceX on Thursday shed more light on the incident. The company traced the anomaly to a cracked sense line that created a liquid oxygen leak within the rocket’s second stage engine. This caused ignition fluid to freeze, preventing the engine from performing a burn that would have placed the satellites in a circular orbit.

Despite the issue, SpaceX said, the engine continued operating as intended through both of its planned burns, but all 20 satellites were lost.

The FAA swiftly grounded Falcon 9 as is standard whenever a launch does not go according to plan. SpaceX submitted a mishap report on the night of the anomaly.

Steve Stich, manager of NASA’s Commercial Crew program, said Friday that “SpaceX went above and beyond” in its assessment of the issue, working with NASA to develop a fault tree, review spacecraft telemetry, analyze video, and search for similar issues on other Falcon models.

The company has opted to remove the faulty sense line, which is redundant and not a part of the spacecraft’s safety system, for near-term Falcon 9 launches. It also agreed upon several corrective actions with the FAA that will be detailed in the coming days.

The FAA must still give a final sign-off for Crew-9 to launch, but the blessing to return to flight should allow SpaceX to meet its mission timeline. Stich on Friday said Crew-9 will launch no earlier than August 18 from Launch Complex 39-A at Kennedy Space Center in Florida, with the launch window extending into September.

The mission represents the fourth flight of this particular Falcon. It will launch SpaceX’s Crew Dragon on its 45th mission to the ISS. Once onboard, four crewmembers will spend six months conducting a range of experiments, including studying the physics of neutron stars and the behavior of wildfires on Earth.

The ISS’ two docking ports are occupied by SpaceX’s Crew-8 Dragon capsule and Boeing’s Starliner, the latter of which will need to make way for Crew-9. Complicating matters, however, is the unexpected extension of Starliner’s inaugural crew flight test (CFT), which has left astronauts Butch Wilmore and Suni Williams aboard the orbital laboratory for nearly two months.

Sources told Ars Technica’s Eric Berger that NASA is considering sending Crew-9 to the ISS with only two astronauts, theoretically making room for Wilmore and Williams to hitch a ride home on SpaceX’s Dragon rather than Starliner.

The scenario is one NASA hopes to avoid. Officials stopped short of calling it a requirement for certification but said that returning the astronauts home on Starliner rather than Dragon is “important” to the program’s goals. According to Stich, teams have finished an approximately monthlong test of Starliner’s thrusters and are working toward a flight readiness review, expected toward the end of next week.

However, Stich also said that NASA has officially handed over the Starliner’s first mission—which was double booked for early next year—to SpaceX. The flight, Starliner-1, will be pushed to no earlier than August 2025, while Falcon 9 and Dragon handle the agency’s tenth commercial crew rotation in February. Starliner-1 will again be double booked with SpaceX Crew-11.

Though SpaceX’s Falcon woes haven’t derailed Crew-9, they may shake up NASA’s busy ISS manifest. The agency is working toward an August 3 launch of Northrop Grumman’s Cygnus, followed by an August 13 Roscosmos launch. Crew-9 would be next, followed by SpaceX’s Polaris Dawn mission, originally scheduled for this month.

Beyond that, NASA wants to make a Soyuz ISS crew exchange in September, launch the Europa Clipper probe in October, and facilitate the Axiom-4 private astronaut mission in November.

Given the rapid turnaround following Falcon 9’s rare mishap, Boeing’s Starliner may be a larger culprit than SpaceX in any future delays.

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NASA in June awarded SpaceX a contract, worth up to $843 million, to design and build the U.S. deorbit vehicle (DV) that will drag the massive laboratory to its final resting place in a remote section of the ocean. No existing spacecraft has the capabilities required to complete the mission.

Ken Bowersox, associate administrator of NASA’s Space Operations Mission Directorate, Dana Weigel, manager of the space agency’s ISS program, and Sarah Walker, director of mission management for SpaceX’s Dragon spacecraft, provided more details on the tall task at hand for SpaceX and predicted what the space station’s final days might look like.

According to Weigel, the U.S. DV contract is different from previous SpaceX contract awards. These have typically been end-to-end, where SpaceX oversees everything from launch through operation. This time, the manufacturer will simply deliver the vehicle for NASA’s use. The contract also has a dwell in storage requirement, which calls for SpaceX to deliver the DV early enough for NASA to perform checkouts prior to launch.

NASA will also need to secure a launch provider for the spacecraft. Walker on Wednesday appeared to throw SpaceX’s hat in that ring as well, saying the company would welcome the opportunity if it arose. NASA uses the firm’s Falcon 9 rocket routinely and has plans to deploy its Falcon Heavy model in the future.

Before Wednesday, little was known about the design of the deorbit vehicle. Officials revealed that it will be a heavily modified version of the company’s Cargo Dragon model, which flies routine ISS resupply missions, but with a specially designed trunk containing propellant, avionics, and more. Walker referred to it as “basically another spacecraft” that will be twice as large as a typical Dragon trunk. The capsule will be pulled from the existing Dragon fleet, and the trunk will be attached.

Walker said the DV will require six times as much useful propellant and three to four times as much power generation and storage. It will also need enough propellant to fly to orbit and operate for several months before completing its mission. By Weigel’s estimate, the vehicle will have a wet mass north of 30,000 kilograms.

NASA was lured by SpaceX’s proposal in part because Dragon is flight-proven hardware—in other words, the agency is familiar with the spacecraft and its systems. Like Dragon, the DV will feature SpaceX Draco engines—46 of them, with 16 on the capsule and 30 in the trunk. About 25 of these will fire at once during the final ISS reentry burn.

In another similarity to Dragon, the vehicle will include both manual and automated functions. Weigel said NASA expects to lose communications during the final four days or so of the mission, during which time the DV will need to manage all onboard tasks.

All of these requirements have driven up the spacecraft’s price, with Bowersox estimating it to be around $750 million. He said that NASA must secure a total of $1.5 billion to cover the DV, launch vehicle, and mission operation, and has asked for $180 million in a supplemental budget request to Congress. If it cannot secure the necessary funding, the money will need to come from NASA’s budget, which Bowersox said could affect ISS operations.

Officials said that projects as complex as the deorbit vehicle concept typically spend five to eight years in development. Per Weigel, the plan is to deorbit the ISS in 2030 for a splashdown in 2031, which would require the DV to launch about one and a half years earlier.

Most of the orbital lab is expected to melt, burn up, or vaporize during its controlled reentry. Weigel said teams have yet to determine where the wreckage will land but that it will be in a remote section of the ocean—potentially the South Pacific—within a narrow area 2,000 kilometers long. She characterized the operation as common for a vehicle as large as the ISS.

The DV will launch and dock to the ISS before the space station uses onboard propulsion to lower its orbit, allowing it to drift closer to Earth. Roscosmos Progress spacecraft may also assist in the maneuver.

Crews will vacate the lab about six months before its retirement. As the ISS approaches an altitude of 250 kilometers, the DV will place it on the proper trajectory and initiate one final burn to bring it home. It will use a massive amount of thrust—enough to drag the massive satellite while resisting drag from atmospheric forces.

Though the DV is being specially designed to deorbit the ISS, Walker did not rule out the possibility that it could find new life with NASA through future applications.

“Anything’s possible,” she said.

As for the ISS, Bowersox said crews will salvage as much as they can, including scientific instruments and mementos such as ship’s logs, despite there being no dedicated recovery mission. The station’s remnants will be divided among the U.S., Canada, Japan, Russia, and the European Union, whose space agencies have continuously occupied it for nearly a quarter of a century. The five agencies share responsibility for safely deorbiting the ISS.

According to Bowersox, all five partners agreed on the U.S. DV concept as the right spacecraft for the mission. However, the mission has not yet received formal approval and could be modified based on feedback.

The hope, Bowersox and Weigel said, is that the ISS deorbit timeline aligns with the launch of a new generation of commercial space stations. NASA has awarded contracts to four firms—Blue Origin, Axiom Space, Northrop Grumman, and Starlab Space, a joint venture between Voyager Space and Airbus—to develop ISS replacements that will be open to federal agencies and private companies alike. The officials said they envision NASA eventually becoming one of many customers in a commercial space ecosystem.

Bowersox predicted that a further extension of the space station’s lifespan is unlikely. In the event that it is retired before commercial alternatives come online, he said NASA will take “whatever steps we could to minimize the impact of that gap.”

In the meantime, the space agency is focused on getting as much as they can out of the space station’s remaining lifecycle, including research that will inform Artemis missions to the moon and beyond. If the deorbit mission goes smoothly, NASA activities shouldn’t miss a beat.

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On Saturday, after 378 days of solitude, crewmembers Anca Selariu, Nathan Jones, Kelly Haston, and Ross Brockwell emerged from Mars Dune Alpha: a 1,700-square-foot simulated Mars habitat part of NASA’s Crew Health and Performance Exploration Analog (CHAPEA) program. The yearlong simulation was the first of three planned exercises with human volunteers.

“Hello. It’s actually just so wonderful to be able to say hello to you all,” said Haston, CHAPEA commander, as cameras captured the moment she stepped outside the 3D-printed habitat.

The goal of CHAPEA is to provide NASA data on the effects of long-duration habitation of Mars by putting the crew through the throes of life on the Red Planet: isolation, equipment failures, limited resources, and plenty of work. Selariu, Jones, Haston, and Brockwell entered the simulator on June 25, 2023.

The habitat includes 3D-printed spaces for cooking, medical, recreation, fitness, work, and growing crops, as well as private quarters and bathrooms for each crewmember. Volunteers tested out each of these amenities, grew and ate crops like tomatoes and peppers, and performed simulated “Marswalks,” collecting data on their physical and mental health.

“We cannot live, dream, create, or explore on any significant time frame if we don’t live these principles, but if we do, we can achieve and sustain amazing and inspiring things like exploring other worlds,” Brockwell said Saturday during a press conference.

In conjunction with Artemis missions to the moon, CHAPEA is helping prepare NASA for flights to Mars and beyond without crews having to leave Earth. According to the space agency, 3D printing could become a unique tool in its arsenal when the time comes.

“Future space exploration settlements have the potential to be 3D printed with additive construction technology to eliminate the need to launch large quantities of building materials on multiple flights, which is cost prohibitive,” the agency says on the Mars Dune Alpha webpage.

In February, NASA put out the call for the next group of CHAPEA volunteers, who are scheduled to enter the habitat in spring 2025.

“Mars is our goal,” said Stephen Koerner, deputy director of NASA’s Johnson Space Center, during the media briefing Saturday. “As global interests and capabilities in space exploration continue to expand, America is poised to lead.”

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For the public, those were the first words heard from NASA astronauts Butch Wilmore and Suni Williams—the crew of the space agency’s Boeing Crew Flight Test (CFT)—since they arrived at the orbital laboratory more than one month ago for an intended eight-day stay.

The Earth-to-orbit call between crew and NASA command was live streamed on the agency’s website. The event answered appeals from members of the media, made during a previous press conference, to see the astronauts on camera as concerns with Boeing’s CST-100 Starliner—which brought them to the ISS—continue to linger.

The spacecraft is contending with two key problems: helium leaks and deactivated or underperforming thrusters. The issues are concentrated within the spacecraft’s service module, which aids in maneuvers such as docking and undocking with the ISS.

NASA and Boeing have indicated that Starliner has more than enough helium to make it home but are continuing to assess the root cause of the leaks. During a hot fire test after docking, four out of the five affected thrusters performed as expected. The fifth was deactivated for the remainder of the mission.

Williams and Wilmore recounted their trip to the space station and the moment they realized that Starliner’s thrusters were not firing at full power. They also sang the spacecraft’s praises, with Wilmore even saying he was tempted to award his first perfect rating for its handling performance.

Separately, NASA and Boeing representatives held a press conference to provide the latest on ongoing ground thruster testing at White Sands Test Facility in New Mexico. Officials again did not provide a firm return date for Wilmore and Williams. But Steve Stich, manager of NASA’s Commercial Crew program, estimated that testing could wrap up by the end of the month, after which point teams will iron out a timeline.

Engineers hope to conduct as many evaluations as possible while the semireusable spacecraft, designed to survive 10 missions, is in orbit. Starliner’s service module, the expendable component of the spacecraft, will be jettisoned and lost as it reenters Earth’s atmosphere.

Astronauts Phone Home

Williams and Wilmore on Wednesday made their long-awaited first appearance on camera since arriving at the ISS on June 6, recounting the CFT’s progress so far.

“Launch was spectacular,” Wilmore said, adding that the spacecraft performed “unbelievably well” during operational capability checks.

However, on the second day of their journey to the ISS, the astronauts could tell something was amiss. As Starliner approached the orbital lab, a total of five reaction control system (RCS) thrusters on its service module either turned off or did not fire at intended strength. Williams and Wilmore commandeered the capsule manually for about one hour as teams on the ground assessed the issue.

“From that point on, you could tell that the thrust was degraded,” Wilmore said. “But it was still impressive.”

Even with less-than-optimal performance, the thrusters completed what Wilmore described as a perfect maneuver as they navigated the final 10 meters to dock Starliner with the space station.

According to Williams, the astronauts talk with mission crews once per week to share and analyze the data they’ve collected. She highlighted the capsule’s ability to serve as a “safe haven” in the event of an ISS evacuation—a role it fulfilled last month after a Russian satellite broke up in orbit.

“We are having a great time here on the ISS,” said Williams. “I’m not complaining, Butch isn’t complaining, that we’re here for a couple extra weeks.”

One question NASA and Boeing have received is whether Starliner could bring Williams and Wilmore home right now. Officials insist it could, but only in an emergency situation that would require the ISS to be evacuated. The astronauts were asked about their confidence level in that scenario.

“I feel confident that, if we had to—if there was a problem with the International Space Station—we could get in the spacecraft and undock, talk with our team, and figure out the best way to come home,” said Williams.

She later added, “I have a real good feeling in my heart that the spacecraft will bring us home no problem.”

Wilmore said he and his crewmate “trust the tests we are doing are the right ones we need to do to get us the right answers, to give us the data we need to come back,” adding that they are “absolutely ready” for a return based on current engineering data.

NASA could send a SpaceX Crew Dragon capsule—which has completed all eight ISS Commercial Crew rotation missions to date—to retrieve the astronauts should Starliner’s issues persist. On Wednesday, Stich said the space agency has not yet opened those discussions with SpaceX, though he did not rule out the possibility.

The astronauts also described their view of Hurricane Beryl from space, saying that their families—who live in Texas and were in the storm’s path—are doing well. Wilmore said he is “90 percent sure” he could see the storm forming off the West coast of Africa days before it was named.

The 20-minute call concluded with some zero-gravity backflips by Williams and a big, smiling thumbs-up from Wilmore.

NASA, Boeing Share More Info

Stich and Mark Nappi, vice president and general manager of Boeing’s Commercial Crew program, addressed the media following the astronauts’ remarks.

According to Stich, Starliner will need to undock before mid-August, when SpaceX’s Crew-8 team swaps with the incoming Crew-9. Williams and Wilmore will need to return a few days before the Crew-9 launch window opens. Starliner remains a “go” for return in an emergency scenario, officials said. But they prefer to wait until ground testing is complete before attempting a by-the-books return,

Stich estimated that hot fire testing at White Sands could “optimistically” wrap up by the end of July, though it could be extended. Teams are working toward a nominal return flight readiness review, standard for crew rotation missions, that would give the green light to finish the mission as planned. 

Should more time be needed, NASA is in the process of approving a 45-day extension of the CFT, which is contingent on the health of Starliner’s batteries. According to Stich, those systems have shown no sign of wear and tear.

The goal of the test campaign is to recreate the firing pattern of one of Starliner’s faulty thrusters using an identical thruster—designed for a future mission—on the ground. Hot fire testing began on July 3, but Stich said crews have so far been unable to achieve the temperatures experienced by the thruster in orbit. Engineers believe the unusual firing pattern could be due to excess heat.

Teams will then attempt to predict how the thrusters might behave as Starliner undocks and flies home. Based on their learnings, they could modify the spacecraft’s flight path, deactivate certain thrusters, or fire them at different rates. Williams and Wilmore are capable of piloting Starliner manually if issues arise.

At the same time, Stich said White Sands personnel are evaluating the service module for Starliner’s inaugural crew rotation mission, Starliner-1, scheduled for February. The current service module has contended with a series of helium leaks, for which crews are attempting to uncover the root cause. Starliner-1’s service module won’t be redesigned, but Nappi said future models could incorporate changes based on the testing at White Sands.

The Outlook

Extended ISS stays are not necessarily uncommon, and the space station is designed to accommodate crew for months at a time if needed.

NASA astronaut Frank Rubio, for example, set a U.S. spaceflight record when his planned six-month mission was nearly doubled to 371 consecutive days aboard the orbital laboratory. Unlike Starliner, the Russian Soyuz capsule that ferried Rubio to the ISS was quickly ruled out as an emergency return vehicle, lending credence to the idea that Boeing’s issues are less severe.

However, NASA and Boeing face the added pressure of certification after close to a decade of delays to the Starliner program. In a prior press conference, Stich acknowledged that NASA and Boeing “understand it’s going to take a little bit longer” to certify Starliner than originally planned.

On Wednesday, the Commercial Crew manager said teams will decide between Starliner-1 or SpaceX Dragon’s Crew-10—which are booked for the same February launch window—once the CFT ends and postflight analysis is complete. The longer that takes, he said, the more likely it is that SpaceX will take over the mission.

Nappi agreed with that assessment, citing the need to understand and fix Starliner’s helium leaks as the biggest obstacle to certification.

NASA and Boeing said Wilmore and Williams will make one more Earth-to-orbit call before they depart the ISS, with more details to come.

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In late 2024 or early 2025, the agency’s Near-Earth Object (NEO) Wide-field Infrared Survey Explorer—or NEOWISE—is expected to come home in pieces following the conclusion of its second mission later this month. The spacecraft, which spent more than a decade collecting data on objects whizzing past the Earth and exploring ways to defend the planet and its satellites from falling rocks and ice, is now at the mercy of the sun. Soon, it will become unusable.

However, NASA has a replacement lined up: the Near Earth Object Surveyor (NEO Surveyor), set for a 2027 launch. The infrared space telescope is the first to be designed specifically for hunting large numbers of NEOs in and around Earth orbit. It has a baseline development cost of $1.2 billion to which NASA committed in 2022.

“NEOWISE has become key in helping us develop and operate NASA’s next-generation infrared space telescope,” said Amy Mainzer, principal investigator of NEOWISE and NEO Surveyor at the University of California at Los Angeles. “It is a precursor mission. NEO Surveyor will seek out the most difficult-to-find asteroids and comets that could cause significant damage to Earth if we don’t find them first.”

On the Hunt

Built by Ball Aerospace & Technologies Corp. and borne out of NASA’s Jet Propulsion Laboratory (JPL), NEOWISE has actually contributed to two separate missions in its 14 years of operation.

Originally known simply as WISE (Wide-field Infrared Survey Explorer), the telescope launched in December 2009 and now orbits the Earth 15 times each day. It was placed in hibernation in 2011 after two years spent discovering and studying galaxies, comets, asteroids, white dwarf stars, and faint objects undetectable to ground-based telescopes.

WISE mapped the entire visible sky using infrared wavelengths—twice—to visualize the clouds of gas and dust orbiting around stars, and its findings are still being analyzed. It also identified tens of millions of supermassive black holes feasting on stars, hiding in plain sight.

After being reactivated in 2013, the spacecraft, now bearing the name NEOWISE, embarked on its second mission, which NASA says has become a key piece of its current planetary defense strategy.

In 2005, Congress directed the space agency to identify and describe at least 9 in 10 of the large space objects that come within 30 million miles of Earth’s orbit. The objective is to seek out hazards and steer them clear of the planet and its growing commercial spaceflight industry.

From near-Earth orbit, NEOWISE so far has taken 1.45 million infrared measurements of 44,000 objects in the solar system. Of those, 3,000 are near-Earth objects (NEOs), including 215 newly discovered NEOs. One of these, named Comet NEOWISE in the spacecraft’s honor, could be seen lighting up the night sky during summer 2020.

“The spacecraft has surpassed all expectations and provided vast amounts of data that the science community will use for decades to come,” said Joseph Hunt, NEOWISE project manager at NASA JPL. “Scientists and engineers who worked on WISE and through NEOWISE also have built a knowledge base that will help inform future infrared survey missions.”

However, because it lacks a propulsion system to keep itself in orbit, the spacecraft has gradually descended toward Earth since launching.

Compounding that is the solar maximum: a period of increased solar activity that occurs every 11 years and appears to be on the horizon, so to speak. Solar flares and other activity are expected to cause atmospheric drag on satellites, which could cause NEOWISE to come tumbling back to Earth as soon as this year.

“The mission has planned for this day a long time,” said Joseph Masiero, deputy principal investigator for the program. “After several years of calm, the sun is waking back up. We are at the mercy of solar activity, and with no means to keep us in orbit, NEOWISE is now slowly spiraling back to Earth.”

As NASA announced in December, the mission will officially come to an end on July 31 when the telescope ceases surveying. The space agency will then place it in hibernation for the final time in August.

Introducing NEO Surveyor

However, NEOWISE’s legacy is expected to live on through NEO Surveyor.

Unlike its predecessor, which found new life under a revised mission profile, NEO Surveyor is being purpose-built to hunt large numbers of asteroids, comets, and other NEOs. Construction of the new design began in December 2022 following a successful technical review, and NASA aims to have it ready in time for a 2027 launch.

Orbiting between the Earth and sun, NEO Surveyor’s mission will be to search for the darkest, least reflective NEOs using its infrared sensors. It will focus mainly on large objects in the neighborhood of Earth’s orbit, which are thought to pose the greatest threat to life should they make impact on the planet or spacecraft. It will also uncover “Earth trojans”—asteroids already in orbit that are often hidden by the sun’s glare.

The program will not eliminate or deflect NEOs, but, as NASA puts it, the agency can only protect Earth and its satellites from hazards if it can identify them first.

“Ground-based telescopes remain essential for us to continually watch the skies, but a space-based infrared observatory is the ultimate high ground that will enable NASA’s planetary defense strategy,” said Lindley Johnson, planetary defense officer at NASA’s Planetary Defense Coordination Office in Washington, D.C.

After launch, NEO Surveyor will use its infrared instruments to complete a five-year baseline survey. Its goal is to find at least two-thirds of the NEOs larger than 460 feet across and describe their composition, shape, orbital behavior, and rotation. The observations are intended to be accurate enough that NASA could easily rediscover each object.

Planetary defense is the program’s highest goal. But NEO Surveyor will further help NASA scientists understand how comets and asteroids form and evolve, also an objective of the space agency’s concurrent Psyche asteroid mission.

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Each nation is allotted one seat on an upcoming Blue Origin flight, and applicants can secure a slot for just $2.50.

“India has achieved remarkable milestones in its space journey the past few years, including becoming the first country to reach the moon’s southern pole,” said Joshua Skurla, co-founder of SERA, of the program’s newest partner nation.

The U.S. and India last month strengthened their collaboration on human spaceflight and space security. NASA is also training an Indian astronaut for a trip to the International Space Station as early as this year.

SERA works with countries that have had few or no citizens reach the final frontier. In April, it purchased six seats on Blue Origin’s New Shepard rocket that will fly citizen astronauts to the Kármán line, which at 100 kilometers is considered the boundary between Earth and space.

Formerly known as the Crypto Space Agency and funded by NFTs, the program played a role in Blue Origin’s fifth crewed spaceflight, NS-21, awarding a seat to Brazilian civil engineer Victor Hespanha, that country’s second astronaut, through a raffle.

According to SERA, more than 8 in 10 astronauts come from just three countries: the United States, Russia, and China. In June, it partnered with Nigeria’s National Space Research and Development Agency to send that country’s first citizen to space.

“Our mission is to democratize space by enabling citizens from over 150 countries with limited access to space to participate in ground-breaking research and create history,” said Skurla. “Our aim is to empower people globally to have a voice and stake in the future of space exploration.”

In an unprecedented move, SERA will allow people around the world to vote on which citizens will take the approximately 11-minute journey.

Anyone living in one of the program’s partner nations can apply to secure a seat. Applicants must be proficient in English, at least 18 years of age, and meet Blue Origin’s parameters for height, weight, physical fitness, and citizenship.

Five of the seats will be allocated to specific nations, and candidates will be voted on by citizens of those nations. The sixth will be open to anyone within a SERA-partnered country and chosen through a global vote. Remaining seat assignments will be announced later this year.

During the second quarter of 2024, voters will choose from 24 final candidates. After that, they will design and vote on the experiments the astronauts will perform during the flight. Later this year, a prelaunch docuseries will reveal the winning experiments.

Following three days of training at Blue Origin’s launch site in West Texas, the civilian crew will strap themselves into New Shepard sometime after the third quarter. The company’s next mission, NS-26, does not yet have an expected launch date.

“By giving communities the power to choose their astronauts, we ensure this mission is driven by people, for people,” said Sam Hutchison, who co-founded SERA alongside Skurla. “This approach will ignite national conversations on space and foster international collaboration in space exploration.”

Hutchison previously served as president of Boeing-backed Reaction Engines, which designs rocket engines intended for hypersonic flight.

SERA says its upcoming mission will be the first of several flights in partnership with Blue Origin. The company’s New Shepard rocket in December made a return to action following a grounding and FAA investigation into a September 2022 incident and in May launched another mission—its first crewed flight in nearly two years.

The spacecraft so far has performed as expected, which should give SERA confidence in being able to send more civilians to space in the near future.

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During a media briefing on Friday, NASA and Boeing representatives said the astronauts’ return to Earth will come after ground testing at the White Sands Test Facility in New Mexico is complete. Teams are working to re-create some of the issues experienced by the reusable spacecraft during its inaugural crewed flight to the orbital laboratory.

According to Steve Stich, manager of NASA’s Commercial Crew program, Starliner was originally deemed safe for a stay as long as 45 days on the ISS. Crews are in the process of extending its battery life, which Stich said will keep the risk level manageable for another 45 days, at least.

However, he conceded that NASA and Boeing “understand it’s going to take a little bit longer” to certify Starliner than previously planned. The spacecraft is scheduled to fly its first service mission, Starliner-1, early next year. Officials said SpaceX’s Crew Dragon, which has completed all eight commercial crew rotation missions to the ISS to date, could take that slot.

“We’re not in any rush to come home,” Stich said Friday. “The risk for the next 45 days is essentially the same as for the first 45 days.”

Added Ken Bowersox, associate administrator of NASA’s Space Operations Mission Directorate: “We have the luxury of time.”

Stich, Bowersox, and Mark Nappi, the manager of Boeing’s commercial crew program,  reiterated that “engineering data suggests” Starliner is safe to return Wilmore and Williams to Earth in the event of an emergency.

Officials also reported that the spacecraft is in “good shape” despite two lingering issues—a set of helium leaks and faulty thrusters.

A total of five helium leaks have sprung up on Starliner’s service module, which makes tiny maneuvers to the spacecraft to assist in docking and keep it in orbit. After testing the helium manifolds earlier this month, NASA found that leak rates had declined. Stich on Friday said those rates have not changed.

The other issue involves the service module’s thrusters, some of which did not fire at full strength en route to the ISS. These were also assessed earlier this month, and Stich said performance on all thrusters is between 80 and 100 percent.

It appears the thrusters are the main factor necessitating a longer mission for Starliner. As soon as Tuesday, engineers will begin testing an identical component at White Sands to re-create the firing pattern of one of the in-orbit thrusters. Officials said the campaign is expected to last several weeks and could be extended.

According to Nappi, teams want to keep Starliner in space for the evaluations because they could inform additional in-orbit tests or a modification of the spacecraft’s undocking procedure. He said crews do not yet understand the issue well enough to fix them permanently and that it would be “irresponsible” not to use additional time to conduct testing. Starliner’s crew module is reusable for up to 10 missions, but the service module will be jettisoned during the CFT.

Nappi said he has been in contact with Wilmore and Williams and that they remain in good spirits, describing Starliner as “pristine and precise.” The astronauts are able to communicate with their families daily and according to officials are not “stranded.”

On Wednesday, Starliner got another real-life test when an in-orbit satellite breakup created a debris field that hurtled toward the ISS. Wilmore and Williams tested the spacecraft’s ability to act as a “safe haven” in the case of a contingency on the space station, getting inside, powering it up, and sealing the hatch. They remained inside for an hour and according to officials were prepared to initiate an undocking if necessary.

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Test rides on the six-axis simulator are meant to simulate the flight of electric vertical takeoff and landing (eVTOL) aircraft in order to help NASA study turbulence on planned air taxi services in New York, Chicago, Los Angeles, and elsewhere in the U.S. The data will be shared with AAM industry partners to help them develop passenger-friendly designs.

The space agency is working with several major air taxi developers through its advanced air mobility (AAM) mission, including Archer Aviation, Joby Aviation, and Boeing eVTOL arm Wisk Aero, to research the experience and safety of riders as well as onlookers on the ground.

“The experiments in the ride quality lab will inform the advanced air mobility community about the acceptability of the motions these aircraft could make, so the general public is more likely to adopt the new technology,” said NASA test pilot Wayne Ringelberg.

Ringelberg served as the passenger for the comfort experiment. The pilot recently flew a series of test rides on the new simulator at NASA’s Armstrong Flight Research Center in Edwards, California, to help prepare it for trials with actual test subjects.

Ringelberg lifted off from a NASA-designed conceptual vertiport atop a downtown San Francisco parking garage, flying over the city to another virtual takeoff and landing site on top of a skyscraper. Sitting in a seat mounted on a six-axis platform that recreates the full range of motion of an air taxi ride, he wore headphones to simulate noise and VR goggles that gave him a view of the cockpit and the city below.

Following the flights, Ringelberg reported to NASA on how realistic and reliable the simulator’s movement and audiovisual cues were.

“This project is leveraging our research and test pilot aircrew with vertical lift experience to validate the safety and accuracy of the lab in preparation for test subject evaluations,” he said.

With Ringelberg’s work finished, the agency will soon begin testing with human subjects. They will similarly wear a VR headset and headphones, flying the same route as the NASA test pilot. During the flight, subjects will press a button to indicate discomfort.

The space agency will analyze those responses and try to match them to the user’s heart rate, breathing rate, and experience of motion or audiovisual stimulus. It will make that data available to air taxi manufacturers and other industry stakeholders to shape flight paths through cities, identify takeoff and landing spots, and guide air taxi design elements like window size and seat placement.

The air taxi simulator is the key component of NASA’s rider quality lab, but that project is itself only a tiny piece of the agency’s AAM mission.

It began using the term AAM in 2020 and has since worked with stakeholders across the industry on a wide range of projects. The initiative focuses on everything from air taxi safety and ride quality to travel time, automation, and infrastructure such as vertiports, preparing industries including healthcare, emergency response, and cargo delivery for the introduction of the novel aircraft.

Within the program is the Advanced Air Vehicles Program (AAVP), which focuses on innovative aircraft designs such as Revolutionary Vertical Lift Technology (RVLT). In addition to passenger comfort, NASA under the RVLT umbrella has studied air taxi batteries, noise, and traffic, particularly around busy airports like Dallas-Fort Worth International Airport (KDFW).

Urban air traffic management and the integration of eVTOL designs into air traffic control operations and the national airspace system is a major part of the space agency’s mission. It aims to complete its research in time for the U.S. to develop a robust air taxi industry by the end of the decade.

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