NASA’s SpaceX Crew-8 Astronauts to Discuss Science Mission
NASA’s SpaceX Crew-8 at the agency’s Kennedy Space Center in Florida. Pictured left to right, Roscosmos cosmonaut Alexander Grebenkin, NASA astronauts Michael Barratt, Matthew Dominick, and Jeanette Epps.
Credit: SpaceX
After spending 235 days in space, NASA’s SpaceX Crew-8 astronauts will discuss their science mission aboard the International Space Station during a post-flight news conference at 3:15 p.m. EST Friday, Nov. 8, from the agency’s Johnson Space Center in Houston.
NASA astronauts Michael Barratt, Matthew Dominick, and Jeanette Epps will answer questions about their mission. The three crew members, along with Roscosmos cosmonaut Alexander Grebenkin, returned to Earth on Oct. 25. Grebenkin will not participate because of his travel schedule.
NASA will provide live coverage on NASA+ and the agency’s website. Learn how to watch NASA content through a variety of additional platforms, including social media.
Media are invited to attend in-person or virtually. For in-person attendance, media must contact the NASA Johnson newsroom no later than 5 p.m. Thursday, Nov. 7 at: jsccommu@mail.nasa.gov or 281-483-5111. Media participating by phone must dial into the news conference no later than 10 minutes prior to the start of the event to ask questions. Questions also may be submitted on social media using #AskNASA. A copy of NASA’s media accreditation policy is available on the agency’s website.
The crew spent more than seven months in space, including 232 days aboard the orbiting laboratory, traveling nearly 100 million miles, and completing 3,760 orbits around Earth. While living and working aboard station, the crew completed hundreds of science experiments and technology demonstrations.
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Learn more about NASA’s Commercial Crew Program at:
NASA’s Hubble, Webb Probe Surprisingly Smooth Disk Around Vega
Teams of astronomers used the combined power of NASA’s Hubble and James Webb space telescopes to revisit the legendary Vega disk.
Credits: NASA, ESA, CSA, STScI, S. Wolff (University of Arizona), K. Su (University of Arizona), A. Gáspár (University of Arizona)
In the 1997 movie “Contact,” adapted from Carl Sagan’s 1985 novel, the lead character scientist Ellie Arroway (played by actor Jodi Foster) takes a space-alien-built wormhole ride to the star Vega. She emerges inside a snowstorm of debris encircling the star — but no obvious planets are visible.
It looks like the filmmakers got it right.
A team of astronomers at the University of Arizona, Tucson used NASA’s Hubble and James Webb space telescopes for an unprecedented in-depth look at the nearly 100-billion-mile-diameter debris disk encircling Vega. “Between the Hubble and Webb telescopes, you get this very clear view of Vega. It’s a mysterious system because it’s unlike other circumstellar disks we’ve looked at,” said Andras Gáspár of the University of Arizona, a member of the research team. “The Vega disk is smooth, ridiculously smooth.”
The big surprise to the research team is that there is no obvious evidence for one or more large planets plowing through the face-on disk like snow tractors. “It’s making us rethink the range and variety among exoplanet systems,” said Kate Su of the University of Arizona, lead author of the paper presenting the Webb findings.
[left] A Hubble Space Telescope false-color view of a 100-billion-mile-wide disk of dust around the summer star Vega. Hubble detects reflected light from dust that is the size of smoke particles largely in a halo on the periphery of the disk. The disk is very smooth, with no evidence of embedded large planets. The black spot at the center blocks out the bright glow of the hot young star. [right] The James Webb Space Telescope resolves the glow of warm dust in a disk halo, at 23 billion miles out. The outer disk (analogous to the solar system’s Kuiper Belt) extends from 7 billion miles to 15 billion miles. The inner disk extends from the inner edge of the outer disk down to close proximity to the star. There is a notable dip in surface brightness of the inner disk from approximately 3.7 to 7.2 billion miles. The black spot at the center is due to lack of data from saturation.
NASA, ESA, CSA, STScI, S. Wolff (University of Arizona), K. Su (University of Arizona), A. Gáspár (University of Arizona)
Webb sees the infrared glow from a disk of particles the size of sand swirling around the sizzling blue-white star that is 40 times brighter than our Sun. Hubble captures an outer halo of this disk, with particles no bigger than the consistency of smoke that are reflecting starlight.
The distribution of dust in the Vega debris disk is layered because the pressure of starlight pushes out the smaller grains faster than larger grains. “Different types of physics will locate different-sized particles at different locations,” said Schuyler Wolff of the University of Arizona team, lead author of the paper presenting the Hubble findings. “The fact that we’re seeing dust particle sizes sorted out can help us understand the underlying dynamics in circumstellar disks.”
The Vega disk does have a subtle gap, around 60 AU (astronomical units) from the star (twice the distance of Neptune from the Sun), but otherwise is very smooth all the way in until it is lost in the glare of the star. This shows that there are no planets down at least to Neptune-mass circulating in large orbits, as in our solar system, say the researchers.
Hubble acquired this image of the circumstellar disk around the star Vega using the Space Telescope Imaging Spectrograph (STIS).
NASA, ESA, CSA, STScI, S. Wolff (University of Arizona), K. Su (University of Arizona), A. Gáspár (University of Arizona)
“We’re seeing in detail how much variety there is among circumstellar disks, and how that variety is tied into the underlying planetary systems. We’re finding a lot out about the planetary systems — even when we can’t see what might be hidden planets,” added Su. “There’s still a lot of unknowns in the planet-formation process, and I think these new observations of Vega are going to help constrain models of planet formation.”
Disk Diversity
Newly forming stars accrete material from a disk of dust and gas that is the flattened remnant of the cloud from which they are forming. In the mid-1990s Hubble found disks around many newly forming stars. The disks are likely sites of planet formation, migration, and sometimes destruction. Fully matured stars like Vega have dusty disks enriched by ongoing “bumper car” collisions among orbiting asteroids and debris from evaporating comets. These are primordial bodies that can survive up to the present 450-million-year age of Vega (our Sun is approximately ten times older than Vega). Dust within our solar system (seen as the Zodiacal light) is also replenished by minor bodies ejecting dust at a rate of about 10 tons per second. This dust is shoved around by planets. This provides a strategy for detecting planets around other stars without seeing them directly – just by witnessing the effects they have on the dust.
“Vega continues to be unusual,” said Wolff. “The architecture of the Vega system is markedly different from our own solar system where giant planets like Jupiter and Saturn are keeping the dust from spreading the way it does with Vega.”
Webb acquired this image of the circumstellar disk around the star Vega using the Mid-Infrared Instrument (MIRI).
NASA, ESA, CSA, STScI, S. Wolff (University of Arizona), K. Su (University of Arizona), A. Gáspár (University of Arizona)
For comparison, there is a nearby star, Fomalhaut, which is about the same distance, age and temperature as Vega. But Fomalhaut’s circumstellar architecture is greatly different from Vega’s. Fomalhaut has three nested debris belts.
Planets are suggested as shepherding bodies around Fomalhaut that gravitationally constrict the dust into rings, though no planets have been positively identified yet. “Given the physical similarity between the stars of Vega and Fomalhaut, why does Fomalhaut seem to have been able to form planets and Vega didn’t?” said team member George Rieke of the University of Arizona, a member of the research team. “What’s the difference? Did the circumstellar environment, or the star itself, create that difference? What’s puzzling is that the same physics is at work in both,” added Wolff.
First Clue to Possible Planetary Construction Yards
Located in the summer constellation Lyra, Vega is one of the brightest stars in the northern sky. Vega is legendary because it offered the first evidence for material orbiting a star — presumably the stuff for making planets — as potential abodes of life. This was first hypothesized by Immanuel Kant in 1775. But it took over 200 years before the first observational evidence was collected in 1984. A puzzling excess of infrared light from warm dust was detected by NASA’s IRAS (Infrared Astronomy Satellite). It was interpreted as a shell or disk of dust extending twice the orbital radius of Pluto from the star.
In 2005, NASA’s infrared Spitzer Space Telescope mapped out a ring of dust around Vega. This was further confirmed by observations using submillimeter telescopes including Caltech’s Submillimeter Observatory on Mauna Kea, Hawaii, and also the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, and ESA’s (European Space Agency’s) Herschel Space Telescope, but none of these telescopes could see much detail. “The Hubble and Webb observations together provide so much more detail that they are telling us something completely new about the Vega system that nobody knew before,” said Rieke.
The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).
The Hubble Space Telescope has been operating for over three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, Colorado, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, Maryland, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
“Discipline is one of the things that they instill within you [in the military.] All the way starting in boot camp, [the goal] is doing the right thing when no one is looking. Integrity.
“Whenever you’re in boot camp, they always say, ‘it’s too easy.’ It’s just too easy to follow the rules, read the book, read the regulations, and that’s probably why I enjoy contracting. I like reading the regulations and following the regulations.
…[Now that I work for Safety and Mission Assurance,] it’s really cool to read everything about the different types of the scenarios. I always get to see the task orders and the type of work that is going on to keep people safe on the ground and in the air.”
— Miranda Meyer, Contract Specialist, NASA’s Goddard Space Flight Center
NASA Offers Virtual Activities for 31st SpaceX Resupply Mission
Creating a golden streak in the night sky, a SpaceX Falcon 9 rocket soars upward after liftoff from Launch Complex 39A at NASA’s Kennedy Space Center in Florida on March 14, 2023, on the company’s 27th Commercial Resupply Services mission for the agency to the International Space Station.
SpaceX
NASA invites the public to participate in virtual activities ahead of the launch of SpaceX’s 31st commercial resupply services mission for the agency. NASA and SpaceX are targeting 9:29 p.m. EST Monday, Nov. 4, for the SpaceX Dragon spacecraft to launch on the company’s Falcon 9 rocket from Launch Complex 39A at NASA’s Kennedy Space Center in Florida.
In addition to food, supplies, and equipment for the crew, Dragon will deliver several new experiments, including the COronal Diagnostic EXperiment to examine solar wind and how it forms, as well as Antarctic moss to observe the combined effects of cosmic radiation and microgravity on plants. Other investigations aboard include a device to test cold welding of metals in microgravity and an investigation that studies how space impacts different materials
Members of the public can register to attend the launch virtually. As a virtual guest, you’ll gain access to curated resources, interactive opportunities, and mission-specific information delivered straight to your inbox. Following liftoff, virtual guests will receive a commemorative stamp for theirvirtual guest passport
Learn more about NASA research and activities on the International Space Station at:
NASA’s Mars rover Curiosity acquired this image using its Right Navigation Camera on sol 4348 — Martian day 4,348 of the Mars Science Laboratory mission — on Oct. 29, 2024, at 14:20:08 UTC.
NASA/JPL-Caltech
Earth planning date: Wednesday, Oct. 30, 2024
Just like you and me, the Curiosity rover has a few idiosyncratic tendencies — special ways that the rover behaves that we, the team on Earth, have come to understand to be harmless but still throw a curveball to our planning.
Unfortunately, the set of activities that were planned to execute on Monday behaved in one of these special ways — leaving the rover’s arm down on the ground without completing the planned set of activities, including the remainder of our contact science, remote sensing, or drive.
When this happens the whole team gets together to review the information Curiosity sends to us, and we ensure as a team that we understand the quirky way the rover acted and that we are good to proceed. While not ideal for keeping up with our scientific cadence, I appreciate these moments because they remind me of all the experts we have evaluating the rover’s health and safety day in and day out.
So for today’s plan — we completed the contact science observations of “Reds Meadow” that had been planned on Monday and picked up a second suite of contact science measurements of “Ladder Lake.” Both of these are bedrock targets and the APXS and MAHLI observations we make will continue our characterization of changes in bedrock composition and morphology in this area. We also repeated the remote sensing observations planned on Monday that did not execute.
With a fresh set of Rover Planner eyes, we reassessed if the drive planned on Monday was still the best we could do and, impressively, today’s RP agreed. So the drive remains the same, making excellent progress toward our next imaging waypoint.
The remainder of the plan contained our usual atmospheric measurements!
We’ll see what Friday holds!
Written by Elena Amador-French, Science Operations Coordinator at NASA’s Jet Propulsion Laboratory
![“Discipline is one of the things that they instill with you [in the military.] All the way starting in boot camp, [the goal] is doing the right thing when nobody's looking. Integrity. Whenever you're in boot camp, they always say, ‘it's too easy.’ It's just too easy to follow the rules, read the book, read the regulations, and that's probably why I enjoy contracting. I like reading the regulations and following the regulations. …[Now that I work for Safety and Mission Assurance,] it's really cool to read everything about the different types of the scenarios. I always get to see the task orders and the type of work that is going on to keep people safe on the ground and in the air.” NASA Contract Specialist at NASA’s Goddard Space Flight Center (GSFC), Miranda Meyer, poses for a portrait, Wednesday, Feb. 7, 2024 at GSFC in Greenbelt, Maryland. Photo Credit: (NASA/Thalia Patrinos)](https://www.nasa.gov/wp-content/uploads/2024/10/nhq202402070015.jpg)
