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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
The SpaceX Dragon Freedom spacecraft carrying NASA astronaut Nick Hague and Roscosmos cosmonaut Aleksandr Gorbunov approaches the International Space Station as it orbited 261 miles above Ontario, Canada, near James Bay. NASA published a new report Thursday highlighting 17 agency mechanisms that have directly and indirectly supported the development and growth of the U.S. commercial space sector for the benefit of humanity.
The report, titled Enabling America on the Space Frontier: The Evolution of NASA’s Commercial Space Development Toolkit, is available on the agency’s website.
“This is the most extensive and comprehensive historical analysis produced by NASA on how it has contributed to commercial space development over the decades,” said Alex MacDonald, NASA chief economist. “These efforts have given NASA regular access to space with companies, such as SpaceX and Rocket Lab, modernizing our communications infrastructure, and even led to the first private lunar lander thanks to Intuitive Machines. With commercial space growth accelerating, this report can help agency leaders and stakeholders assess the numerous mechanisms that the agency uses to support this growth, both now and in the future.”
Throughout its history, NASA has supported the development of the commercial space sector, not only leading the way in areas such as satellite communications, launch, and remote sensing, but also developing new contract and operational models to encourage commercial participation and growth. In the last three decades, NASA has seen the results of these efforts with commercial partners able to contribute more to missions across NASA domains, and increasingly innovative agency-led efforts to engage, nurture, and integrate these capabilities. These capabilities support the agency’s mission needs, and have seen a dramatic rise in importance, according to the report.
NASA has nurtured technology, companies, people, and ideas in the commercial space sector, contributing to the U.S. and global economies, across four distinct periods in the agency’s history:
1915–1960: NASA’s predecessor, the National Advisory Committee on Aeronautics (NACA), and NASA’s pre-Apollo years. 1961–1980: Apollo era. 1981–2010: Space shuttle era. 2011–present: Post-shuttle commercial era. Each of these time periods are defined by dominant technologies, programs, or economic trends further detailed in the report.
Though some of these mechanisms are relatively recent, others have been used throughout the history of NASA and NACA, leading to some overlap. The 17 mechanisms are as follows:
Contracts and Partnership Agreements Research and Technology Development (R&TD) Dissemination of Research and Scientific Data Education and Workforce Development Workforce External Engagement and Mobility Technology Transfer Technical Support Enabling Infrastructure Launch Direct In-Space Support Standards and Regulatory Framework Support Public Engagement Industry Engagement Venture Capital Engagement Market Stimulation Funding Economic Analysis and Due Diligence Capabilities Narrative Encouragement NASA supports commercial space development in everything from spaceflight to supply chains. Small satellite capabilities have inspired a new generation of space start-ups, while new, smaller rockets, as well as new programs are just starting. Examples include CLPS (Commercial Lunar Payload Services), commercial low Earth orbit destinations, human landing systems, commercial development of NASA spacesuits, and lunar terrain vehicles. The report also details many indirect ways the agency has contributed to the vibrance of commercial space, from economic analyses to student engagement.
The agency’s use of commercial capabilities has progressed from being the exception to the default method for many of its missions. The current post-shuttle era of NASA-supported commercial space development has seen a level of technical development comparable to the Apollo era’s Space Race. Deploying the 17 commercial space development mechanisms in the future are part of NASA’s mission to continue encouraging commercial space activities.
To learn more about NASA’s missions, please visit:
https//:www.nasa.gov
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Last Updated Dec 19, 2024 EditorBill Keeter Related Terms
Office of Technology, Policy and Strategy (OTPS) View the full article
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By NASA
6 Min Read NASA Discovers a Long-Sought Global Electric Field on Earth
The geographic North Pole seen from the Endurance rocket ship at 477 miles (768 kilometers) altitude above the Arctic. The faint red and green streaks at the top of the image are artifacts of lens flare. Credits: NASA Key Points
A rocket team reports the first successful detection of Earth’s ambipolar electric field: a weak, planet-wide electric field as fundamental as Earth’s gravity and magnetic fields. First hypothesized more than 60 years ago, the ambipolar electric field is a key driver of the “polar wind,” a steady outflow of charged particles into space that occurs above Earth’s poles. This electric field lifts charged particles in our upper atmosphere to greater heights than they would otherwise reach and may have shaped our planet’s evolution in ways yet to be explored.
Using observations from a NASA suborbital rocket, an international team of scientists has, for the first time, successfully measured a planet-wide electric field thought to be as fundamental to Earth as its gravity and magnetic fields. Known as the ambipolar electric field, scientists first hypothesized over 60 years ago that it drove how our planet’s atmosphere can escape above Earth’s North and South Poles. Measurements from the rocket, NASA’s Endurance mission, have confirmed the existence of the ambipolar field and quantified its strength, revealing its role in driving atmospheric escape and shaping our ionosphere — a layer of the upper atmosphere — more broadly.
Understanding the complex movements and evolution of our planet’s atmosphere provides clues not only to the history of Earth but also gives us insight into the mysteries of other planets and determining which ones might be hospitable to life. The paper was published Wednesday, Aug. 28, 2024, in the journal Nature.
Credit: NASA’s Goddard Space Flight Center/Lacey Young
Download this video and related animations from NASA’s Scientific Visualization Studio. An Electric Field Drawing Particles Out to Space
Since the late 1960s, spacecraft flying over Earth’s poles have detected a stream of particles flowing from our atmosphere into space. Theorists predicted this outflow, which they dubbed the “polar wind,” spurring research to understand its causes.
Some amount of outflow from our atmosphere was expected. Intense, unfiltered sunlight should cause some particles from our air to escape into space, like steam evaporating from a pot of water. But the observed polar wind was more mysterious. Many particles within it were cold, with no signs they had been heated — yet they were traveling at supersonic speeds.
“Something had to be drawing these particles out of the atmosphere,” said Glyn Collinson, principal investigator of Endurance at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and lead author of the paper. Scientists suspected a yet-to-be-discovered electric field could be at work.
The hypothesized electric field, generated at the subatomic scale, was expected to be incredibly weak, with its effects felt only over hundreds of miles. For decades, detecting it was beyond the limits of existing technology. In 2016, Collinson and his team got to work inventing a new instrument they thought was up to the task of measuring Earth’s ambipolar field.
Launching a Rocket from the Arctic
The team’s instruments and ideas were best suited for a suborbital rocket flight launched from the Arctic. In a nod to the ship that carried Ernest Shackleton on his famous 1914 voyage to Antarctica, the team named their mission Endurance. The scientists set a course for Svalbard, a Norwegian archipelago just a few hundred miles from the North Pole and home to the northernmost rocket range in the world.
“Svalbard is the only rocket range in the world where you can fly through the polar wind and make the measurements we needed,” said Suzie Imber, a space physicist at the University of Leicester, UK, and co-author of the paper.
On May 11, 2022, Endurance launched and reached an altitude of 477.23 miles (768.03 kilometers), splashing down 19 minutes later in the Greenland Sea. Across the 322-mile altitude range where it collected data, Endurance measured a change in electric potential of only 0.55 volts.
“A half a volt is almost nothing — it’s only about as strong as a watch battery,” Collinson said. “But that’s just the right amount to explain the polar wind.”
The Endurance rocket ship launches from Ny-Ålesund, Svalbard. Credit: Andøya Space/Leif Jonny Eilertsen Hydrogen ions, the most abundant type of particle in the polar wind, experience an outward force from this field 10.6 times stronger than gravity. “That’s more than enough to counter gravity — in fact, it’s enough to launch them upwards into space at supersonic speeds,” said Alex Glocer, Endurance project scientist at NASA Goddard and co-author of the paper.
Heavier particles also get a boost. Oxygen ions at that same altitude, immersed in this half-a-volt field, weigh half as much. In general, the team found that the ambipolar field increases what’s known as the “scale height” of the ionosphere by 271%, meaning the ionosphere remains denser to greater heights than it would be without it.
“It’s like this conveyor belt, lifting the atmosphere up into space,” Collinson added.
Endurance’s discovery has opened many new paths for exploration. The ambipolar field, as a fundamental energy field of our planet alongside gravity and magnetism, may have continuously shaped the evolution of our atmosphere in ways we can now begin to explore. Because it’s created by the internal dynamics of an atmosphere, similar electric fields are expected to exist on other planets, including Venus and Mars.
“Any planet with an atmosphere should have an ambipolar field,” Collinson said. “Now that we’ve finally measured it, we can begin learning how it’s shaped our planet as well as others over time.”
By Miles Hatfield and Rachel Lense
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Endurance was a NASA-funded mission conducted through the Sounding Rocket Program at NASA’s Wallops Flight Facility in Virginia. The Svalbard Rocket Range is owned and operated by Andøya Space. The European Incoherent Scatter Scientific Association (EISCAT) Svalbard radar, located in Longyearbyen, made ground-based measurements of the ionosphere critical to interpreting the rocket data. The United Kingdom Natural Environment Research Council (NERC) and the Research Council of Norway (RCN) funded the EISCAT radar for the Endurance mission. EISCAT is owned and operated by research institutes and research councils of Norway, Sweden, Finland, Japan, China, and the United Kingdom (the EISCAT Associates). The Endurance mission team encompasses affiliates of the Catholic University of America, Embry-Riddle Aeronautical University, the University of California, Berkeley, the University of Colorado at Boulder, the University of Leicester, U.K., the University of New Hampshire, and Penn State University.
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Last Updated Aug 28, 2024 Related Terms
Goddard Space Flight Center Heliophysics Heliophysics Division Ionosphere Science & Research Sounding Rockets Sounding Rockets Program View the full article
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By NASA
The crew of the Human Exploration Research Analog’s Campaign 7 Mission 1 clasp hands above their simulated space habitat’s elevator shaft.Credit: NASA NASA is funding 11 new studies to better understand how to best support the health and performance of crew members during long-duration spaceflight missions. The awardees will complete the studies on Earth without the need for samples and data from astronauts.
Together, the studies will help measure physiological and psychological responses to physical and mental challenges that astronauts may encounter during spaceflight. The projects will address numerous spaceflight risks related to team performance, communication, living environment, decision-making, blood flow, and brain health. With this information, NASA will better mitigate risks and protect astronaut health and performance during future long-duration missions to the Moon, Mars, and beyond.
The 11 finalists were selected from 123 proposals in response to the 2024 Human Exploration Research Opportunities available through the NASA Solicitation and Proposal Integrated Review and Evaluation System. Selected proposals originate from 10 institutions, and the cumulative award totals about $14.6 million. The durations of the projects range from one to five years.
The following investigators and teams were selected:
Katya Arquilla, University Of Colorado, Boulder, “Investigating Countermeasures for Communication Delays through the Laboratory-based Exploration Mission Analog” Tripp Driskell, Florida Maxima Corporation, “CADMUS (Crew Adaptive Decision Making Under Stress) and Crew Decision Support System: Development, Validation, and Proof-of-Concept” Christopher Jones, University of Pennsylvania, Philadelphia, “Predicting Operationally Meaningful Performance with Multivariate Biomarkers Using Advanced Algorithms” Jessica Marquez, NASA Ames Research Center, Silicon Valley, California, “Enhancing Performance and Communication for Distributed Teams During Lunar Spacewalks” Shu-Chieh Wu, San Jose State University Research Foundation, California, “Lessening the Impact of Interface Inconsistency Through Goal-Directed Crew Operations” Erika Rashka, Johns Hopkins University, Baltimore, “Local Psychiatric Digital Phenotyping for Isolated, Constrained, and Extreme (ICE) Environments via Multimodal Sensing” Ana Diaz Artiles, Texas A&M Engineering Experiment Station, College Station, “Dose-response Curves of Cardiovascular and Ocular Variables During Graded Lower Body Negative Pressure in Microgravity Conditions Using Parabolic Flight” Theodora Chaspari, University Of Colorado, Boulder, “A Speech-Based Artificial Intelligence System for Predicting Team Functioning Degradation in HERA (Human Exploration Research Analog) Missions” Ute Fischer, Georgia Tech Research Corporation, Atlanta, “Supporting Collaboration and Connectedness between Space and Ground at Lunar Latencies” Xiaohong Lu, Louisiana State University, Shreveport, “Space Exposome Converges on Genotoxic Stress to Accelerate Brain Aging and Countermeasures to Mitigate Acute and Late Central Nervous System Risks” Catherine Davis, Henry M. Jackson Foundation For The Advancement of Military Medicine, North Bethesda, Maryland, “NeuroSTAR (Neurobehavioral Changes Following Stressors and Radiation): Predicting Mission Impacts from Analogous Human and Rodent Endpoints” Proposals were independently reviewed by subject matter experts in academia, industry, and government using a dual anonymous peer-review process to assess scientific merit. NASA assessed the top scoring proposals for relevance to the agency’s human research roadmap before final selections were made.
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NASA’s Human Research Program pursues the best methods and technologies to support safe, productive human space travel. Through science conducted in laboratories, ground-based analogs, and the International Space Station, the program scrutinizes how spaceflight affects human bodies and behaviors. Such research continues to drive NASA’s mission to innovate ways that keep astronauts healthy as space exploration expands to the Moon, Mars, and beyond.
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By NASA
Through a nonlinear path to success, research astrophysicist Tyler Parsotan discovers transformational science using Swift’s observations.
Name: Tyler Parsotan
Formal Job Classification: Research astrophysicist
Organization: Astroparticle Physics Laboratory (Code 661), Astrophysics Science Division, Sciences and Exploration Directorate
Dr. Tyler Parsotan is a research astrophysicist at NASA’s Goddard Space Flight Center in Greenbelt, Md. He helps operate the Bust Alert Telescope on board the Neil Gehrels Swift Observatory. Courtesy of Tyler Parsotan What do you do and what is most interesting about your role here at Goddard?
I help operate the Burst Alert Telescope on board the Neil Gehrels Swift Observatory to study some of the most powerful astrophysical processes in the universe. What is most interesting is the engineering capabilities that have gone into the spacecraft to make it nimble and robust, allowing it to conduct a wide range of transformative science.
Why did you become an astrophysicist?
Ever since I was young, I was fascinated with the stars and how the world worked. All of this led me to physics with a focus on astrophysics. That is how I got into what I am doing now.
What is your educational background?
In 2015, I got a Bachelor of Science in space physics from Embry Riddle Aeronautical University in Daytona Beach, Florida. In 2019, I got a master’s in physics from Oregon State University, Corvallis, and in 2020 I got a master’s in mechanical engineering also from Oregon State University. In 2021, I got a doctorate in physics from Oregon State University.
When I first applied to graduate school, I did not get into any. I was fortunate enough to learn about Oregon State University though a program geared towards allowing underrepresented students in STEM fields to get graduate degrees. This program, known as the Ronald E. McNair Post-baccalaureate Achievement Program, played a pivotal role in me being able to attend graduate school .
Are you also a pilot?
Yes, I am. While I was in Oregon as a graduate student, I was able to save up enough money to get my private pilot’s license over the course of one summer from the local Corvallis airport. I would bike to the airport and get in a plane to fly all over Oregon from the coast to the Cascade Mountains. It was a very cool experience.
How did you come to Goddard?
I did a post-doctorate fellowship starting the fall of 2021 through May 2023. My doctoral research was related to one of Swift’s many science focuses, so I wanted to continue my work at Goddard.
What transformational science have you been involved with using Swift’s observations?
Some of the science that Swift focuses on is related to the transient universe, meaning that we primarily look at astrophysical events that come and go very quickly and typically produce a ton of energy. Swift examines the light energy produced from black holes, the majority of which are eating mass from black stars.
While at Oregon State University, I studied the most energetic events in the universe known as gamma-ray bursts. I am now studying gamma-ray bursts at Goddard. One of the big discoveries made by Swift is that these gamma ray bursts can be seen out to early times in the universe. Some of these explosions occurred when the universe was very young, only 100,000 years old or so. Because the universe is expanding, it takes that light some time to travel to us. With Swift, we detect that light and can make some measurements about the gamma-ray bursts, such as when they occurred, how much energy they produced in these massive explosions, and some of the properties of the early universe.
“There are no linear paths to success,” said Tyler. “Keep looking for a way to be successful. This advice applies to life overall.”Courtesy of Tyler Parsotan What is the biggest discovery you have been involved with and what do you love most about working on Swift?
We are simulating the gamma-ray bursts, which was a focus of my doctorate. We cannot yet actually see these explosions, so we have to simulate them using the physics that we now know. I have been able to connect some of the large simulations to the Swift observations and measurements. This helps us better understand the underlying physics of these powerful explosions.
The amount of energy produced in a typical gamma-ray burst is enough to blow up the Sun a few times over.
Lots of people know about Hubble, which observes the light that we can see with our eyes. The light that I deal with, gamma rays, has much higher energy and cannot be seen with our eyes. We have to use different techniques to measure this light. Designing detectors to measure this light is challenging technically but means that this area of physics is ripe for discovery. I love being part of this.
Swift will be 20 years old in November 2024. As a relative newcomer to Swift, what are your thoughts?
I think Swift is a great observatory because it has conducted lots of transformational science, drastically expanding our knowledge of the cosmos. Even though it is getting older, it is still able to push science forward in new and exciting ways. I am looking forward to helping the Swift mission celebrate 20 years of amazing science.
What is your advice to anyone starting and continuing a career?
There are no linear paths to success. Keep looking for a way to be successful. This advice applies to life overall.
Are you involved in any of Goddard’s extracurricular activities?
I recently joined Goddard’s soccer league. Everyone at Goddard self organizes into teams that play each other after work during the week. We play about a game a week. The winning team gets bragging rights. I mostly play defense. Being on a team is a good way to meet people at Goddard and to stay active.
In addition to soccer, what are your hobbies?
I enjoy hiking, mountain biking, and generally being outdoors.
Where do you see yourself in five years?
I hope to still be at Goddard. I enjoy the type of work and the overall work environment. If Swift continues another five years, hopefully I’ll be working on it and also helping to create the next generation of gamma-ray observatories to help push science forward. We are making the science that will be in the next textbooks.
Who do you want to thank?
My doctoral supervisor Davide Lazzati was an extremely supportive mentor and pushed me to be the best scientist that I can be. Since I arrived at Goddard, we have been good colleagues.
My former mentor and supervisor at Goddard is Brad Cenko, the Swift principal investigator. I am grateful that he hired me and allowed me to grow as a post-doctoral researcher.
I also want to thank my entire family for being extremely supportive and understanding even though they may not fully understand what I really do.
Who is your science hero?
Copernicus. He put forward the theory that our solar system orbits the Sun. He was obviously very instrumental in changing the way we think about the cosmos. He got into a lot of trouble with his theory, which makes his accomplishments all the more important.
By Elizabeth M. Jarrell
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Conversations With Goddard is a collection of Q&A profiles highlighting the breadth and depth of NASA’s Goddard Space Flight Center’s talented and diverse workforce. The Conversations have been published twice a month on average since May 2011. Read past editions on Goddard’s “Our People” webpage.
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Last Updated Aug 20, 2024 EditorMadison OlsonContactRob Garnerrob.garner@nasa.govLocationGoddard Space Flight Center Related Terms
People of Goddard Goddard Space Flight Center Neil Gehrels Swift Observatory People of NASA Explore More
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
This panorama shows the area NASA’s Perseverance Mars rover will climb in coming months to crest Jezero Crater’s rim. It is made up of 59 images taken by the rover’s Mastcam-Z on Aug. 4.NASA/JPL-Caltech/ASU/MSSS After 2½ years exploring Jezero Crater’s floor and river delta, the rover will ascend to an area where it will search for more discoveries that could rewrite Mars’ history.
NASA’s Perseverance Mars rover will soon begin a monthslong ascent up the western rim of Jezero Crater that is likely to include some of the steepest and most challenging terrain the rover has encountered to date. Scheduled to start the week of Aug. 19, the climb will mark the kickoff of the mission’s new science campaign — its fifth since the rover landed in the crater on Feb. 18, 2021.
“Perseverance has completed four science campaigns, collected 22 rock cores, and traveled over 18 unpaved miles,” said Perseverance project manager Art Thompson of NASA’s Jet Propulsion Laboratory in Southern California. “As we start the Crater Rim Campaign, our rover is in excellent condition, and the team is raring to see what’s on the roof of this place.”
Two of the priority regions the science team wants to study at the top of the crater are nicknamed “Pico Turquino” and “Witch Hazel Hill.” Imagery from NASA’s Mars orbiters indicates that Pico Turquino contains ancient fractures that may have been caused by hydrothermal activity in the distant past.
One of the navigation cameras aboard NASA’s Perseverance Mars rover captured this view looking back at the “Bright Angel” area on July 30, the 1,224th Martian day, or sol, of the mission. NASA/JPL-Caltech Orbital views of Witch Hazel show layered materials that likely date from a time when Mars had a very different climate than today. Those views have revealed light-toned bedrock similar to what was found at “Bright Angel,” the area where Perseverance recently discovered and sampled the “Cheyava Falls” rock, which exhibits chemical signatures and structures that could possibly have been formed by life billions of years ago when the area contained running water.
It’s Sedimentary
During the river delta exploration phase of the mission, the rover collected the only sedimentary rock ever sampled from a planet other than Earth. Sedimentary rocks are important because they form when particles of various sizes are transported by water and deposited into a standing body of water; on Earth, liquid water is one of the most important requirements for life as we know it.
A study published Wednesday, Aug. 14, in AGU Advances chronicles the 10 rock cores gathered from sedimentary rocks in an ancient Martian delta, a fan-shaped collection of rocks and sediment that formed billions of years ago at the convergence of a river and a crater lake.
The core samples collected at the fan front are the oldest, whereas the rocks cored at the fan top are likely the youngest, produced when flowing water deposited sediment in the western fan.
“Among these rock cores are likely the oldest materials sampled from any known environment that was potentially habitable,” said Tanja Bosak, a geobiologist at the Massachusetts Institute of Technology in Cambridge and member of Perseverance’s science team. “When we bring them back to Earth, they can tell us so much about when, why, and for how long Mars contained liquid water and whether some organic, prebiotic, and potentially even biological evolution may have taken place on that planet.”
This map shows the route NASA’s Perseverance Mars rover will take (in blue) as it climbs the western rim of Jezero Crater, first reaching “Dox Castle,” then investigating the “Pico Turquino” area before approaching “Witch Hazel Hill.” NASA/JPL-Caltech/University of Arizona Onward to the Crater Rim
As scientifically intriguing as the samples have been so far, the mission expects many more discoveries to come.
“Our samples are already an incredibly scientifically compelling collection, but the crater rim promises to provide even more samples that will have significant implications for our understanding of Martian geologic history,” said Eleni Ravanis, a University of Hawaiì at Mānoa scientist on Perseverance’s Mastcam-Z instrument team and one of the Crater Rim Campaign science leads. “This is because we expect to investigate rocks from the most ancient crust of Mars. These rocks formed from a wealth of different processes, and some represent potentially habitable ancient environments that have never been examined up close before.”
Reaching the top of the crater won’t be easy. To get there, Perseverance will rely on its auto-navigation capabilities as it follows a route that rover planners designed to minimize hazards while still giving the science team plenty to investigate. Encountering slopes of up to 23 degrees on the journey (rover drivers avoid terrain that would tilt Perseverance more than 30 degrees), the rover will have gained about 1,000 feet (300 meters) in elevation by the time it summits the crater’s rim at a location the science team has dubbed “Aurora Park.”
Then, perched hundreds of meters above a crater floor stretching 28 miles (45 kilometers) across, Perseverance can begin the next leg of its adventure.
More Mission Information
A key objective of Perseverance’s mission on Mars is astrobiology, including caching samples that may contain signs of ancient microbial life. The rover will characterize the planet’s geology and past climate, to help pave the way for human exploration of the Red Planet and as the first mission to collect and cache Martian rock and regolith.
NASA’s Mars Sample Return Program, in cooperation with ESA (European Space Agency), is designed to send spacecraft to Mars to collect these sealed samples from the surface and return them to Earth for in-depth analysis.
The Mars 2020 Perseverance mission is part of NASA’s Moon to Mars exploration approach, which includes Artemis missions to the Moon that will help prepare for human exploration of the Red Planet.
NASA’s Jet Propulsion Laboratory, which is managed for the agency by Caltech, built and manages operations of the Perseverance rover.
For more about Perseverance:
science.nasa.gov/mission/mars-2020-perseverance
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DC Agle
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-9011
agle@jpl.nasa.gov
Alise Fisher / Erin Morton
NASA Headquarters, Washington
202-358-1600
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Last Updated Aug 14, 2024 Related Terms
Perseverance (Rover) Jet Propulsion Laboratory Mars Mars 2020 Mars Sample Return (MSR) The Solar System Explore More
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