Jump to content

Recommended Posts

  • Publishers
Posted
A white man with curly gray hair and glasses smiles slightly in front of a backdrop of green sea grasses and blue sky. He wears a white shirt and necklace.
“I do evolutionary programming,” said NASA Goddard oceanographer Dr. John Moisan. “I see a lot of possibility in using evolutionary programming to solve many large problems we are trying to solve. How did life start and evolve? Can these processes be used to evolve intelligence or sentience?”
Courtesy of John Moisan

Name: John Moisan

Formal Job Classification: Research oceanographer

Organization: Ocean Ecology Laboratory, Hydrosphere, Biosphere, Geophysics (HBG), Earth Science Directorate (Code 616) – duty station at NASA’s Wallops Flight Facility on Virginia’s Eastern Shore

What do you do and what is most interesting about your role here at Goddard? How do you help support Goddard’s mission?

I develop ecosystem models and satellite algorithms to understand how the ocean’s ecology works. My work has evolved over time from when I coded ocean ecosystem models to the present where I now use artificial intelligence to evolve the ocean ecosystem models.

How did you become an oceanographer?

As a child, I watched a TV series called “Sea Hunt,” which involved looking for treasure in the ocean. It inspired me to want to spend my life scuba diving.

I got a Bachelor of Science in marine biology from the University of New England in Biddeford, Maine, and later got a Ph.D. from the Center for Coastal Physical Oceanography at Old Dominion University in Norfolk, Virginia.

Initially, I just wanted to do marine biology which to me meant doing lots of scuba diving, maybe living on a sailboat. Later, when I was starting my graduate schoolwork, I found a book about mathematical biology and a great professor who helped open my eyes to the world of numerical modeling. I found out that instead of scuba diving, I needed instead to spend my days behind a computer, learning how to craft ideas into equations and then code these into a computer to run simulations on ocean ecosystems.

I put myself through my initial education. I went to school fulltime, but I lived at home and hitchhiked to college on a daily basis. When I started my graduate school, I worked to support myself. I was in school during the normal work week, but from Friday evening through Sunday night, I worked 40 hours at a medical center cleaning and sterilizing the operating room instrument carts. This was during the height of the AIDS epidemic.

What was most exciting about your two field trips to the Antarctic?

In 1987, I joined a six-week research expedition to an Antarctic research station to explore how the ozone hole was impacting phytoplankton. These are single-celled algae that are responsible for making half the oxygen we breathe. Traveling to Antarctica is like visiting another planet. There are more types of blue than I’ve ever seen. It is an amazingly beautiful place to visit, with wild landscapes, glaciers, mountains, sea ice, and a wide range of wildlife. After my first trip I returned home and went back in a few months later as a biologist on a joint Polish–U.S. (National Oceanic and Atmospheric Administration) expedition to carry out a biological survey and measure how much fast the phytoplankton was growing in different areas of the Southern Ocean. We used nets to measure the amounts of fish and shrimp and took water samples to measure salinity, the amount of algae and their growth rates. We ate well, for example the Polish cook made up a large batch of smoked ice fish.

What other field work have you done?

While a graduate student, I helped do some benthic work in the Gulf of Maine. This study was focused on understanding the rates of respiration in the muds on the bottom of the ocean and on understanding how much biomass was in the muds. The project lowered a benthic grab device to the bottom where it would push a box core device into the sediments to return it to the surface. This process is sort of like doing a biopsy of the ocean bottom.

What is your goal as a research oceanographer at Goddard?

Ocean scientists measure the amount and variability of chlorophyll a, a pigment in algae, in the ocean because it is an analogue to the amount of algae or phytoplankton in the ocean. Chlorophyll a is used to capture solar energy to make sugars, which the algae use for growth. Generally, areas of the ocean that have more chlorophyll are also areas where growth or primary production is higher. So, by estimating how much chlorophyll is in the ocean we can study how these processes are changing with an aim in understanding why. NASA uses the color of the ocean using satellites to estimate chlorophyll a because chlorophyll absorbs sunlight and changes the color of the ocean. Algae have other kinds of pigments, each of which absorbs light at different wavelengths. Because different groups of algae have different levels of pigments, they are like fingerprints that can reveal the type of algae in the water. Some of my research aims at trying to use artificial intelligence and mathematical techniques to create new ways to measure these pigments from space to understand how ocean ecosystems change.

In 2024, NASA plans to launch the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite, which will measure the color of the ocean at many different wavelengths. The data from this satellite can be used with results from my work on genetic programs and inverse modeling to estimate concentrations of different pigments and possibly concentrations of different types of algae in the ocean.

You have been at Goddard over 22 years. What is most memorable to you?

I develop ecosystem models. But ecosystems do not have laws in the same way that physics has laws. Equations need to be created so that the ecosystem models represent what is observed in the real world. Satellites have been a great source for those observations, but without a lot of other types of observations that are collected in the field, the ocean, it is difficult to develop these equations. In my time at NASA, I have only been able to develop models because of the great but often tedious work that ocean scientists around the world have been doing when they go on ocean expeditions to measure various ocean features, be it simple temperature or the more complicated measurements of algal growth rates. My experience with their willingness to collaborate and share data is especially memorable. This experience is also what I enjoyed with numerous scientists at NASA who have always been willing to support new ideas and point me in the right direction. It has made working at NASA a phenomenal experience.

a blue swat cuts diagonally across pale blue and yelllow mottled landscape indicating a deeper channel in marshland.
Infrared images like this one from a marsh area on the Maryland/Virginia Eastern Shore coastal barrier and back bay regions reveal clues to scientists about plant health, photosynthesis, and other conditions that affect vegetation and ecosystems.
John Moisan

Related Article: NASA Researcher’s AI ‘Eye’ Could Help Robotic Data-Gathering

What are the philosophical implications of your work?

The human capacity to think rapidly, to test and change our opinions based on what we learn, is slow compared to that of a computer. Computers can help us adapt more quickly. I can put 1,000 students in a room developing ecosystem model models. But I know that this process of developing ecosystem models is slow when compared what a computer can do using an artificial intelligence approach called genetic programming, it is a much faster way to generate ecosystem model solutions.

Philosophically, there is no real ecosystem model that is the best. Life and ecosystems on Earth change and adapt at rates too fast for any present-day model to resolve, especially considering climate change. The only real ecosystem model is the reality itself. No computer model can perfectly simulate ecosystems. By utilizing the fast adaptability that evolutionary computer modeling techniques provide, simulating and ultimately predicting ecosystems can be improved greatly.

How does your work have implications for scientists in general?

I do evolutionary programming. I see a lot of possibility in using evolutionary programming to solve many large problems we are trying to solve. How did life start and evolve? Can these processes be used to evolve intelligence or sentience?

The artificial intelligence (AI) work answers questions, but you need to identify the questions. This is the greater problem when it comes to working with AI. You cannot answer the question of how to create a sentient life if you do not know how to define it. If I cannot measure life, how can I model it? I do not know how to write that equation. How does life evolve? How did the evolutionary process start? These are big questions I enjoy discussing with friends. It can be as frustrating as contemplating “nothing.”

Who inspires you?

Many of the scientists that I was fortunate to work with at various research institutes, such as Scripps Institution of Oceanography at the University of California, San Diego. These are groups of scientists are open to always willing to share their ideas. These are individuals who enjoy doing science. I will always be indebted to them for their kindness in sharing of ideas and data.

Do you still scuba dive?

Yes, I wish I could dive daily, it is a very calming experience. I’m trying to get my kids to join me.

What else do you do for fun?

My wife and I bike and travel. Our next big bike trip will hopefully be to Shangri-La City in China. I also enjoy sailing and trying to grow tropical plants. But, most of all, I enjoy helping raise my children to be resilient, empathic, and intelligent beings.

What are your words to live by?

Life. So much to see. So little time.

A graphic with a collection of people's portraits grouped together in front of a soft blue galaxy background. The people come from various races, ethnicities, and genders. A soft yellow star shines in the upper left corner, and the stylized text u0022Conversations with Goddardu0022 is in white on the far right.
Conversations With Goddard is a collection of question and answer 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.

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.

Share

Details

Last Updated
Feb 10, 2025
Editor
Jessica Evans
Contact
Keep Exploring

Discover More Topics From NASA

View the full article

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By NASA
      3 Min Read NASA Invests in Future STEM Workforce Through Space Grant Awards 
      NASA is awarding up to $870,000 annually to 52 institutions across the United States, the District of Columbia, and Puerto Rico over the next four years. The investments aim to create opportunities for the next generation of innovators by supporting workforce development, science, technology, engineering and math education, and aerospace collaboration nationwide. 
      The Space Grant College and Fellowship Program (Space Grant), established by Congress in 1989, is a workforce development initiative administered through NASA’s Office of STEM Engagement (OSTEM). The program’s mission is to produce a highly skilled workforce prepared to advance NASA’s mission and bolster the nation’s aerospace sector. 
      “The Space Grant program exemplifies NASA’s commitment to cultivating a new generation of STEM leaders,” said Torry Johnson, deputy associate administrator of the STEM Engagement Program at NASA Headquarters in Washington. “By partnering with institutions across the country, we ensure that students have the resources, mentorship, and experiences needed to thrive in the aerospace workforce.” 
      The following is a complete list of awardees: 
      University of Alaska, Fairbanks  University of Alabama, Huntsville  University of Arkansas, Little Rock  University of Arizona  University of California, San Diego  University of Colorado, Boulder  University of Hartford, Connecticut  American University, Washington, DC  University of Delaware  University of Central Florida  Georgia Institute of Technology  University of Hawaii, Honolulu  Iowa State University, Ames  University of Idaho, Moscow  University of Illinois, Urbana-Champaign  Purdue University, Indiana  Wichita State University, Kansas  University of Kentucky, Lexington  Louisiana State University and A&M College  Massachusetts Institute of Technology  Johns Hopkins University, Maryland  Maine Space Grant Consortium  University of Michigan, Ann Arbor  University of Minnesota  Missouri University of Science and Technology  University of Mississippi  Montana State University, Bozeman  North Carolina State University  University of North Dakota, Grand Forks  University of Nebraska, Omaha  University of New Hampshire, Durham  Rutgers University, New Brunswick, New Jersey  New Mexico State University  Nevada System of Higher Education  Cornell University, New York  Ohio Aerospace Institute  University of Oklahoma  Oregon State University  Pennsylvania State University  University of Puerto Rico  Brown University, Rhode Island  College of Charleston, South Carolina  South Dakota School of Mines & Technology  Vanderbilt University, Tennessee  University of Texas, Austin  University of Utah, Salt Lake City  Old Dominion University Research Foundation, Virginia  University of Vermont, Burlington  University of Washington, Seattle  Carthage College, Wisconsin  West Virginia University  University of Wyoming  Space Grant operates through state-based consortia, which include universities, university systems, associations, government agencies, industries, and informal education organizations engaged in aerospace activities. Each consortium’s lead institution coordinates efforts within its state, expanding opportunities for students and researchers while promoting collaboration with NASA and aerospace-related industries nationwide. 
      To learn more about NASA’s missions, visit: https://www.nasa.gov/ 

      View the full article
    • By NASA
      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      One of several NASA distributed sensing ground nodes is set up in the foreground while an experimental air taxi aircraft owned by Joby Aviation sits in the background near NASA’s Armstrong Flight Research Center in Edwards, California, on March 12, 2025. NASA is collecting information during this study to help advance future air taxi flights, especially those occurring in cities, to track aircraft moving through traffic corridors and around landing zones.NASA/Genaro Vavuris NASA engineers began using a network of ground sensors in March to collect data from an experimental air taxi to evaluate how to safely integrate such vehicles into airspace above cities – in all kinds of weather.
      Researchers will use the campaign to help improve tools to assist with collision avoidance and landing operations and ensure safe and efficient air taxi operations in various weather conditions.
      For years, NASA has looked at how wind shaped by terrain, including buildings in urban areas, can affect new types of aircraft. The latest test, which is gathering data from a Joby Aviation demonstrator aircraft, looks at another kind of wind – that which is generated by the aircraft themselves.
      Joby flew its air taxi demonstrator over NASA’s ground sensor array near the agency’s Armstrong Flight Research Center in Edwards, California producing air flow data. The Joby aircraft has six rotors that allow for vertical takeoffs and landings, and tilt to provide lift in flight. Researchers focused on the air pushed by the propellers, which rolls into turbulent, circular patterns of wind.
      NASA aeronautical meteorologist Luke Bard adjusts one of several wind lidar (light detection and ranging) sensors near NASA’s Armstrong Flight Research Center in Edwards, California, on March 12, 2025, in preparation to collect data from Joby Aviation’s experimental air taxi aircraft. NASA is collecting information during this study to help advance weather-tolerant air taxi operations for the entire industryNASA/Genaro Vavuris This rolling wind can affect the aircraft’s performance, especially when it’s close to the ground, as well as others flying in the vicinity and people on the ground. Such wind turbulence is difficult to measure, so NASA enhanced its sensors with a new type of lidar – a system that uses lasers to measure precise distances – and that can map out the shapes of wind features.
      “The design of this new type of aircraft, paired with the NASA lidar technology during this study, warrants a better understanding of possible wind and turbulence effects that can influence safe and efficient flights,” said Grady Koch, lead for this research effort, from NASA’s Langley Research Center in Hampton, Virginia.
      Data to Improve Aircraft Tracking
      NASA also set up a second array of ground nodes including radar, cameras, and microphones in the same location as the sensors to provide additional data on the aircraft. These nodes will collect tracking data during routine flights for several months.
      The agency will use the data gathered from these ground nodes to demonstrate the tracking capabilities and functions of its “distributed sensing” technology, which involves embedding multiple sensors in an area where aircraft are operating.
      One of multiple NASA distributed sensing ground nodes is set up in the foreground while an experimental air taxi aircraft owned by Joby Aviation hovers in the background near NASA’s Armstrong Flight Research Center in Edwards, California, on March 12, 2025. NASA is collecting information during this study to help advance future air taxi flights, especially those occurring in cities, to track aircraft moving through traffic corridors and around landing zones.NASA/Genaro Vavuris This technology will be important for future air taxi flights, especially those occurring in cities by tracking aircraft moving through traffic corridors and around landing zones. Distributed sensing has the potential to enhance collision avoidance systems, air traffic management, ground-based landing sensors, and more.
      “Our early work on a distributed network of sensors, and through this study, gives us the opportunity to test new technologies that can someday assist in airspace monitoring and collision avoidance above cities,” said George Gorospe, lead for this effort from NASA’s Ames Research Center in California’s Silicon Valley.
      Using this data from an experimental air taxi aircraft, NASA will further develop the technology needed to help create safer air taxi flights in high-traffic areas. Both of these efforts will benefit the companies working to bring air taxis and drones safely into the airspace.
      The work is led by NASA’s Transformational Tools and Technologies and Convergent Aeronautics Solutions projects under the Transformative Aeronautics Concepts program in support of NASA’s Advanced Air Mobility mission. NASA’s Advanced Air Mobility mission seeks to deliver data to guide the industry’s development of electric air taxis and drones.
      Share
      Details
      Last Updated Apr 17, 2025 EditorDede DiniusContactTeresa Whitingteresa.whiting@nasa.govLocationArmstrong Flight Research Center Related Terms
      Armstrong Flight Research Center Advanced Air Mobility Ames Research Center Convergent Aeronautics Solutions Drones & You Flight Innovation Glenn Research Center Langley Research Center Transformational Tools Technologies Transformative Aeronautics Concepts Program Explore More
      3 min read NASA’s Curiosity Rover May Have Solved Mars’ Missing Carbonate Mystery
      Article 3 hours ago 1 min read Recognizing Employee Excellence 
      Article 8 hours ago 3 min read Testing in the Clouds: NASA Flies to Improve Satellite Data
      Article 23 hours ago Keep Exploring Discover More Topics From NASA
      Armstrong Flight Research Center
      Humans in Space
      Climate Change
      Solar System
      View the full article
    • By NASA
      Explore This Section Science Science Activation Exploring the Universe Through… Overview Learning Resources Science Activation Teams SME Map Opportunities More Science Activation Stories Citizen Science   3 min read
      Exploring the Universe Through Sight, Touch, and Sound
      For the first time in history, we can explore the universe through a rich blend of senses—seeing, touching, and hearing astronomical data—in ways that deepen our understanding of space. While three-dimensional (3D) models are essential tools for scientific discovery and analysis, their potential extends far beyond the lab.
      Space can often feel distant and abstract, like watching a cosmic show unfold on a screen light-years away. But thanks to remarkable advances in technology, software, and science, we can now transform telescope data into detailed 3D models of objects millions or even billions of miles away. These models aren’t based on imagination—they are built from real data, using measurements of motion, light, and structure to recreate celestial phenomena in three dimensions.
      What’s more, we can bring these digital models into the physical world through 3D printing. Using innovations in additive manufacturing, data becomes something you can hold in your hands. This is particularly powerful for children, individuals who are blind or have low vision, and anyone with a passion for lifelong learning. Now, anyone can quite literally grasp a piece of the universe.
      These models also provide a compelling way to explore concepts like scale. While a 3D print might be just four inches wide, the object it represents could be tens of millions of billions of times larger—some are so vast that a million Earths could fit inside them. Holding a scaled version of something so massive creates a bridge between human experience and cosmic reality.
      In addition to visualizing and physically interacting with the data, we can also listen to it. Through a process called sonification, telescope data is translated into sound, making information accessible and engaging in a whole new way. Just like translating a language, sonification conveys the essence of astronomical data through audio, allowing people to “hear” the universe.
      To bring these powerful experiences to communities across the country, NASA’s Universe of Learning, in collaboration with the Library of Congress, NASA’s Chandra X-ray Observatory, and the Space Telescope Science Institute, has created Mini Stars 3D Kits that explore key stages of stellar evolution. These kits have been distributed to Library of Congress state hubs across the United States to engage local learners through hands-on and multisensory discovery.
      Each Mini Stars Kit includes:
      Three 3D-printed models of objects within our own Milky Way galaxy: Pillars of Creation (M16/Eagle Nebula) – a stellar nursery where new stars are born Eta Carinae – a massive, unstable star system approaching the end of its life Crab Nebula – the aftermath of a supernova, featuring a dense neutron star at its core Audio files with data sonifications for each object—mathematical translations of telescope data into sound Descriptive text to guide users through each model’s scientific significance and sensory interpretation These kits empower people of all ages and abilities to explore the cosmos through touch and sound—turning scientific data into a deeply human experience. Experience your universe through touch and sound at: https://chandra.si.edu/tactile/ministar.html
      Credits:
      3D Prints Credit: NASA/CXC/ K. Arcand, A. Jubett, using software by Tactile Universe/N. Bonne & C. Krawczyk & Blender
      Sonifications: Dr. Kimberly Arcand (CXC), astrophysicist Dr. Matt Russo, and musician Andrew Santaguida (both of the SYSTEM Sounds project)
      3D Model: K. Arcand, R. Crawford, L. Hustak (STScI)
      Photo of NASA’s Universe of Learning (UoL) 3D printed mini star kits sent to the Library of Congress state library hubs. The kits include 3D printed models of stars, sonifications, data converted into sound, and descriptive handouts available in both text and braille. Share








      Details
      Last Updated Apr 14, 2025 Editor NASA Science Editorial Team Related Terms
      Science Activation 3D Resources Astrophysics Manufacturing, Materials, 3-D Printing The Universe Explore More
      5 min read With NASA’s Webb, Dying Star’s Energetic Display Comes Into Full Focus


      Article


      5 hours ago
      4 min read GLOBE Mission Earth Supports Career Technical Education


      Article


      3 days ago
      2 min read Hubble Captures a Star’s Swan Song


      Article


      3 days ago
      Keep Exploring Discover More Topics From NASA
      James Webb Space Telescope


      Webb is the premier observatory of the next decade, serving thousands of astronomers worldwide. It studies every phase in the…


      Perseverance Rover


      This rover and its aerial sidekick were assigned to study the geology of Mars and seek signs of ancient microbial…


      Parker Solar Probe


      On a mission to “touch the Sun,” NASA’s Parker Solar Probe became the first spacecraft to fly through the corona…


      Juno


      NASA’s Juno spacecraft entered orbit around Jupiter in 2016, the first explorer to peer below the planet’s dense clouds to…

      View the full article
    • By NASA
      6 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      This mosaic showing the Martian surface outside of Jezero Crater was taken by NASA’s Perseverance on Dec. 25, 2024, at the site where the rover cored a sample dubbed “Silver Mountain” from a rock likely formed during Mars’ earliest geologic period.NASA/JPL-Caltech/ASU/MSSS The diversity of rock types along the rim of Jezero Crater offers a wide glimpse of Martian history.
      Scientists with NASA’s Perseverance rover are exploring what they consider a veritable Martian cornucopia full of intriguing rocky outcrops on the rim of Jezero Crater. Studying rocks, boulders, and outcrops helps scientists understand the planet’s history, evolution, and potential for past or present habitability. Since January, the rover has cored five rocks on the rim, sealing samples from three of them in sample tubes. It’s also performed up-close analysis of seven rocks and analyzed another 83 from afar by zapping them with a laser. This is the mission’s fastest science-collection tempo since the rover landed on the Red Planet more than four years ago.
      Perseverance climbed the western wall of Jezero Crater for 3½ months, reaching the rim on Dec. 12, 2024, and is currently exploring a roughly 445-foot-tall (135-meter-tall) slope the science team calls “Witch Hazel Hill.” The diversity of rocks they have found there has gone beyond their expectations.
      “During previous science campaigns in Jezero, it could take several months to find a rock that was significantly different from the last rock we sampled and scientifically unique enough for sampling,” said Perseverance’s project scientist, Katie Stack Morgan of NASA’s Jet Propulsion Laboratory in Southern California. “But up here on the crater rim, there are new and intriguing rocks everywhere the rover turns. It has been all we had hoped for and more.”
      One of Perseverance’s hazard cameras captured the rover’s coring drill collecting the “Main River” rock sample on “Witch Hazel Hill” on March 10, 2025, the 1,441st Martian day, or sol, of the mission. NASA/JPL-Caltech That’s because Jezero Crater’s western rim contains tons of fragmented once-molten rocks that were knocked out of their subterranean home billions of years ago by one or more meteor impacts, including possibly the one that produced Jezero Crater. Perseverance is finding these formerly underground boulders juxtaposed with well-preserved layered rocks that were “born” billions of years ago on what would become the crater’s rim. And just a short drive away is a boulder showing signs that it was modified by water nestled beside one that saw little water in its past.
      Oldest Sample Yet?
      Perseverance collected its first crater-rim rock sample, named “Silver Mountain,” on Jan. 28. (NASA scientists informally nickname Martian features, including rocks and, separately, rock samples, to help keep track of them.) The rock it came from, called “Shallow Bay,” most likely formed at least 3.9 billion years ago during Mars’ earliest geologic period, the Noachian, and it may have been broken up and recrystallized during an ancient meteor impact.
      About 360 feet (110 meters) away from that sampling site is an outcrop that caught the science team’s eye because it contains igneous minerals crystallized from magma deep in the Martian crust. (Igneous rocks can form deep underground from magma or from volcanic activity at the surface, and they are excellent record-keepers — particularly because mineral crystals within them preserve details about the precise moment they formed.) But after two coring attempts (on Feb. 4 and Feb. 8) fizzled due to the rock being so crumbly, the rover drove about 520 feet (160 meters) northwest to another scientifically intriguing rock, dubbed “Tablelands.”
      Data from the rover’s instruments indicates that Tablelands is made almost entirely of serpentine minerals, which form when large amounts of water react with iron- and magnesium-bearing minerals in igneous rock. During this process, called serpentinization, the rock’s original structure and mineralogy change, often causing it to expand and fracture. Byproducts of the process sometimes include hydrogen gas, which can lead to the generation of methane in the presence of carbon dioxide. On Earth, such rocks can support microbial communities.
      Coring Tablelands went smoothly. But sealing it became an engineering challenge.
      Sealing the “Green Gardens” sample — collected by NASA’s Perseverance Mars rover from a rock dubbed “Tablelands” along the rim of Jezero Crater on Feb. 16, 2025 — pre-sented an engineering challenge. The sample was finally sealed on March 2.NASA/JPL-Caltech/ASU/MSSS Flick Maneuver
      “This happened once before, when there was enough powdered rock at the top of the tube that it interfered with getting a perfect seal,” said Kyle Kaplan, a robotics engineer at JPL. “For Tablelands, we pulled out all the stops. Over 13 sols,” or Martian days, “we used a tool to brush out the top of the tube 33 times and made eight sealing attempts. We even flicked it a second time.”
      During a flick maneuver, the sample handling arm — a little robotic arm in the rover’s belly — presses the tube against a wall inside the rover, then pulls the tube away, causing it to vibrate. On March 2, the combination of flicks and brushings cleaned the tube’s top opening enough for Perseverance to seal and store the serpentine-laden rock sample. 
      Eight days later, the rover had no issues sealing its third rim sample, from a rock called “Main River.” The alternating bright and dark bands on the rock were like nothing the science team had seen before.
      Up Next
      Following the collection of the Main River sample, the rover has continued exploring Witch Hazel Hill, analyzing three more rocky outcrops (“Sally’s Cove,” “Dennis Pond,” and “Mount Pearl”). And the team isn’t done yet.  
      “The last four months have been a whirlwind for the science team, and we still feel that Witch Hazel Hill has more to tell us,” said Stack. “We’ll use all the rover data gathered recently to decide if and where to collect the next sample from the crater rim. Crater rims — you gotta love ’em.”
      More About Perseverance
      A key objective for Perseverance’s mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover is characterizing the planet’s geology and past climate, to help pave the way for human exploration of the Red Planet and is 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 Mars Exploration Program portfolio and the agency’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, managed for the agency by Caltech in Pasadena, California, built and manages operations of the Perseverance rover.
      For more about Perseverance:
      https://science.nasa.gov/mission/mars-2020-perseverance
      News Media Contacts
      DC Agle
      Jet Propulsion Laboratory, Pasadena, Calif.
      818-393-9011
      agle@jpl.nasa.gov
      Karen Fox / Molly Wasser
      NASA Headquarters, Washington
      202-358-1600
      karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov  
      2025-051
      Share
      Details
      Last Updated Apr 10, 2025 Related Terms
      Perseverance (Rover) Mars Mars 2020 Explore More
      5 min read Perseverance Rover Witnesses One Martian Dust Devil Eating Another
      Article 7 days ago 6 min read How NASA’s Perseverance Is Helping Prepare Astronauts for Mars
      Article 2 weeks ago 6 min read NASA’s Curiosity Rover Detects Largest Organic Molecules Found on Mars
      Lee esta historia en español aquí. Researchers analyzing pulverized rock onboard NASA’s Curiosity rover have found…
      Article 2 weeks ago Keep Exploring Discover Related Topics
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
    • By NASA
      Explore Hubble Hubble Home Overview About Hubble The History of Hubble Hubble Timeline Why Have a Telescope in Space? Hubble by the Numbers At the Museum FAQs Impact & Benefits Hubble’s Impact & Benefits Science Impacts Cultural Impact Technology Benefits Impact on Human Spaceflight Astro Community Impacts Science Hubble Science Science Themes Science Highlights Science Behind Discoveries Hubble’s Partners in Science Universe Uncovered Explore the Night Sky Observatory Hubble Observatory Hubble Design Mission Operations Missions to Hubble Hubble vs Webb Team Hubble Team Career Aspirations Hubble Astronauts News Hubble News Social Media Media Resources Multimedia Multimedia Images Videos Sonifications Podcasts e-Books Online Activities Lithographs Fact Sheets Posters Hubble on the NASA App Glossary More 35th Anniversary Online Activities 2 min read
      Hubble Studies a Nearby Galaxy’s Star Formation
      This NASA/ESA Hubble Space Telescope image features the picturesque spiral galaxy NGC 4941. ESA/Hubble & NASA, D. Thilker This NASA/ESA Hubble Space Telescope image features the picturesque spiral galaxy NGC 4941, which lies about 67 million light-years from Earth in the constellation Virgo (The Maiden). Because this galaxy is nearby, cosmically speaking, Hubble’s keen instruments are able to pick out exquisite details such as individual star clusters and filamentary clouds of gas and dust.
      The data used to construct this image were collected as part of an observing program that investigates the star formation and stellar feedback cycle in nearby galaxies. As stars form in dense, cold clumps of gas, they begin to influence their surroundings. Stars heat and stir up the gas clouds in which they form through winds, starlight, and — eventually, for massive stars — by exploding as supernovae. These processes are collectively called stellar feedback, and they influence the rate at which a galaxy can form new stars.
      As it turns out, stars aren’t the only entities providing feedback in NGC 4941. At the heart of this galaxy lies an active galactic nucleus: a supermassive black hole feasting on gas. As the black hole amasses gas from its surroundings, the gas swirls into a superheated disk that glows brightly at wavelengths across the electromagnetic spectrum. Similar to stars — but on a much, much larger scale — active galactic nuclei shape their surroundings through winds, radiation, and powerful jets, altering not only star formation but also the evolution of the galaxy as a whole.
      Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
      Claire Andreoli (claire.andreoli@nasa.gov)
      NASA’s Goddard Space Flight Center, Greenbelt, MD
      Share








      Details
      Last Updated Apr 04, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Hubble Space Telescope Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Spiral Galaxies The Universe Keep Exploring Discover More Topics From Hubble
      Hubble Space Telescope


      Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.


      Hubble’s Night Sky Challenge



      Hubble’s Galaxies



      35 Years of Hubble Images


      View the full article
  • Check out these Videos

×
×
  • Create New...