Tag: nasa

NASA reveals date for attempted return flight of Starliner

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NASA is targeting Friday, September 6, for the return flight of Boeing Space’s troubled Starliner spacecraft, the agency revealed on Thursday.

The vehicle will come home from the International Space Station (ISS) nearly three months later than originally planned and without the crew that it arrived with. The flight, the outcome of which could determine the Starliner’s future, is expected to take about six hours, NASA said in a blog post on Thursday.

“After undocking [at 6:04 p.m. ET], the Starliner will take about six hours to reach the landing zone at White Sands Space Harbor in New Mexico,” NASA said in the post. “The spacecraft will touch down about 12:03 a.m. on Saturday, September 7, descending under parachutes and with inflated airbags to cushion the impact.”

The Starliner has been docked at the ISS since early June after completing its first-ever crewed flight, with NASA astronauts Suni Williams and Butch Wilmore taking the ride.

But as it approached the ISS on June 6, issues emerged with some of the spacecraft’s thrusters. Several helium leaks were also detected.

The thrusters are key in guiding the Starliner toward its reentry point into Earth’s atmosphere for the trip home, and so NASA paused the return voyage to give it time to learn more about the issue and to confirm if it was safe to put Williams and Wilmore inside the capsule for the return journey.

After much research and deliberation, NASA announced last week that out of an abundance of caution, the two astronauts would instead fly home on a SpaceX Crew Dragon spacecraft in February 2025, with the Starliner returning empty.

And now we have a target date for what’s set to be a crucial flight for Boeing’s space vehicle.

In Thursday’s blog post, NASA said that all being well, the uncrewed Starliner spacecraft will perform a fully autonomous return overseen by flight controllers at Starliner Mission Control in Houston and at Boeing Mission Control Center in Florida.

It added that if the Starliner fails to perform as expected, teams on the ground will be able to remotely command the spacecraft through the necessary maneuvers for a safe undocking, re-entry, and parachute-assisted landing.

But clearly it’s not so confident that it’s willing to put Williams and Wilmore aboard the spacecraft for the journey home.

The current mission is the Starliner’s third flight to date. The first one in December 2019 ended in failure when the vehicle was unable to reach the ISS, though it returned safely. Its second test flight, in 2022, managed to successfully dock with the ISS and also return home.






Starliner astronauts will come home in February on a SpaceX Crew Dragon

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After more than two months of tests and discussions, NASA has decided that astronauts Butch Wilmore and Suni Williams will come home in February 2025 on a SpaceX Crew Dragon, and the Boeing Starliner they flew to the International Space Station on in June will return uncrewed. In a press conference on Saturday, Steve Stich, manager for NASA’s Commercial Crew Program, said “there was too much uncertainty” around the predictions for Starliner’s thrusters to move forward with a crewed return flight.

The plan now is that Starliner’s first crew will return with SpaceX’s Crew-9, which is scheduled to launch to the ISS at the end of September. Crew-9 was initially supposed to carry four crew members, but will instead have to go ahead with two, so as to make room for Wilmore and Williams on the way back. That spacecraft is being reconfigured with seats for the two astronauts, and Dragon spacesuits will be added to its cargo for them to wear home. By the time Wilmore and Williams depart, the duo will have been on the space station for about eight months. The Starliner flight test was only supposed to last a little over a week.

The next step is to get Starliner ready for undocking and wrap up as an uncrewed flight test. The agency plans to conduct the second part of its readiness review for the process this coming week, and expects undocking to take place around early next month. “We are changing the separation sequence that we planned and we will review those aspects at the readiness review,” Stich said. “We’re going to go with a simplified separation technique to get away from the station a little more quickly.”

The issue with Starliner’s thrusters has been “very complex,” Stich said, and their performance has been “challenging to predict.” Without being able to accurately predict how the thrusters would perform from undocking through the deorbit burn, the potential risks for the astronauts were just too high, he explained.

“We have had mistakes in the past,” said NASA Administrator Bill Nelson. “We have lost two space shuttles as a result of there not being a culture in which information can come forward.” With that context looming over the discussions, he said, “We have been very solicitous of all of our employees that if you have some objection, you come forward. Spaceflight is risky, even at its safest and and its most routine, and a test flight by its nature is neither safe nor routine. And so the decision to keep Butch and Suni aboard the International Space Station and bring the Boeing Starliner home uncrewed is the result of a commitment to safety.”

Scientists find evidence of liquid water deep underneath the Martian surface

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Water exists on Mars, according to a team of geophysicists, and not just as ice on its poles or as vapor in its atmosphere. The scientists have found evidence of liquid water deep in its outer crust, based on their analysis of data provided by NASA’s Mars Insight Lander. Specifically, they analyzed four years’ worth of ground motions recorded by the lander’s seismometer. By looking at seismic velocities, or how fast seismic waves travel on the planet, they were able to determine the materials that the waves moved through. What they found was that Mars’ mid-crust has fractured igneous rocks saturated with liquid water.

One of the scientists involved in the study, Prof Michael Manga from the University of California, Berkeley, told the BBC that they implemented the same techniques used “to prospect for water on Earth, or to look for oil and gas.” He said his group’s findings can answer the question of where all the water on Mars had gone, because features on the planet’s surface showed that it had lakes and rivers around three billion years ago. While there’s a theory that most of that water was lost to space, scientists have challenged that idea in recent years. One study by Caltech and NASA JPL published in 2021 found data that most of that water is still trapped in the planet’s crust.

The scientists involved in this newer study, published in PNAS, were only able to analyze seismic velocity data taken from underneath the lander. However, they believe that similar underground water reservoirs exist all over the planet, and they estimate that there’s enough liquid water under the surface to form a layer across Mars that’s half a mile deep. Manga told the the BBC that “much of our water is underground and there’s no reason for that not to be the case on Mars too.”

While the team’s findings could be taken as good news for space agencies and private companies looking to visit and even form human colonies on the planet, it won’t be easy reaching Mars’ water reservoirs. They’re located around 7 to 12.5 miles below the surface, which won’t be easy to reach even on our planet. “Drilling a hole 10km (6 miles) deep on Mars — even for [Elon] Musk — would be difficult,” Manga said, adding that “without liquid water, you don’t have life.”

NASA’s Curiosity rover accidentally uncovered pure sulfur crystals on Mars

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NASA scientists say pure sulfur has been found on Mars for the first time after the Curiosity rover inadvertently uncovered a cluster of yellow crystals when it drove over a rock. And it looks like the area is filled with it. It’s an unexpected discovery — while minerals containing sulfur have been observed on the Red Planet, elemental sulfur on its own has never been seen there before. “It forms in only a narrow range of conditions that scientists haven’t associated with the history of this location,” according to .

Curiosity cracked open the rock on May 30 while driving in a region known as the Gediz Vallis channel, where similar rocks were seen all around. The channel is thought to have been carved by water and debris flows long ago. “Finding a field of stones made of pure sulfur is like finding an oasis in the desert,” said Ashwin Vasavada, Curiosity’s project scientist. “It shouldn’t be there, so now we have to explain it. Discovering strange and unexpected things is what makes planetary exploration so exciting.”

A rock run over and cracked by the Curiosity rover revealing yellow sulfur crystalsA rock run over and cracked by the Curiosity rover revealing yellow sulfur crystals

NASA/JPL-Caltech/MSSS

After spotting the yellow crystals, the team later used a camera on Curiosity’s robotic arm to take a closer look. The rover then took a sample from a different rock nearby, as the pieces of the rock it had smashed were too brittle for drilling. Curiosity is equipped with instruments that allow it to analyze the composition of rocks and soil, and NASA says its Alpha Particle X-Ray Spectrometer (APXS) confirmed it had found elemental sulfur.