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By NASA
Hubble Space Telescope Home NASA’s Hubble, MAVEN… Missions 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 Hubble News Archive Social Media Media Resources Multimedia Multimedia Images Videos Sonifications Podcasts E-books Lithographs Fact Sheets Glossary Posters Hubble on the NASA App More Online Activities 6 min read
NASA’s Hubble, MAVEN Help Solve the Mystery of Mars’ Escaping Water
NASA, ESA, STScI, John T. Clarke (Boston University); Processing: Joseph DePasquale (STScI) Mars was once a very wet planet as is evident in its surface geological features. Scientists know that over the last 3 billion years, at least some water went deep underground, but what happened to the rest? Now, NASA’s Hubble Space Telescope and MAVEN (Mars Atmosphere and Volatile Evolution) missions are helping unlock that mystery.
“There are only two places water can go. It can freeze into the ground, or the water molecule can break into atoms, and the atoms can escape from the top of the atmosphere into space,” explained study leader John Clarke of the Center for Space Physics at Boston University in Massachusetts. “To understand how much water there was and what happened to it, we need to understand how the atoms escape into space.”
Clarke and his team combined data from Hubble and MAVEN to measure the number and current escape rate of the hydrogen atoms escaping into space. This information allowed them to extrapolate the escape rate backwards through time to understand the history of water on the Red Planet.
Escaping Hydrogen and “Heavy Hydrogen”
Water molecules in the Martian atmosphere are broken apart by sunlight into hydrogen and oxygen atoms. Specifically, the team measured hydrogen and deuterium, which is a hydrogen atom with a neutron in its nucleus. This neutron gives deuterium twice the mass of hydrogen. Because its mass is higher, deuterium escapes into space much more slowly than regular hydrogen.
Over time, as more hydrogen was lost than deuterium, the ratio of deuterium to hydrogen built up in the atmosphere. Measuring the ratio today gives scientists a clue to how much water was present during the warm, wet period on Mars. By studying how these atoms currently escape, they can understand the processes that determined the escape rates over the last four billion years and thereby extrapolate back in time.
Although most of the study’s data comes from the MAVEN spacecraft, MAVEN is not sensitive enough to see the deuterium emission at all times of the Martian year. Unlike the Earth, Mars swings far from the Sun in its elliptical orbit during the long Martian winter, and the deuterium emissions become faint. Clarke and his team needed the Hubble data to “fill in the blanks” and complete an annual cycle for three Martian years (each of which is 687 Earth days). Hubble also provided additional data going back to 1991 – prior to MAVEN’s arrival at Mars in 2014.
The combination of data between these missions provided the first holistic view of hydrogen atoms escaping Mars into space.
These are far-ultraviolet Hubble images of Mars near its farthest point from the Sun, called aphelion, on December 31, 2017 (top), and near its closest approach to the Sun, called perihelion, on December 19, 2016 (bottom). The atmosphere is clearly brighter and more extended when Mars is close to the Sun.
Reflected sunlight from Mars at these wavelengths shows scattering by atmospheric molecules and haze, while the polar ice caps and some surface features are also visible. Hubble and MAVEN showed that Martian atmospheric conditions change very quickly. When Mars is close to the Sun, water molecules rise very rapidly through the atmosphere, breaking apart and releasing atoms at high altitudes. NASA, ESA, STScI, John T. Clarke (Boston University); Processing: Joseph DePasquale (STScI)
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A Dynamic and Turbulent Martian Atmosphere
“In recent years scientists have found that Mars has an annual cycle that is much more dynamic than people expected 10 or 15 years ago,” explained Clarke. “The whole atmosphere is very turbulent, heating up and cooling down on short timescales, even down to hours. The atmosphere expands and contracts as the brightness of the Sun at Mars varies by 40 percent over the course of a Martian year.”
The team discovered that the escape rates of hydrogen and deuterium change rapidly when Mars is close to the Sun. In the classical picture that scientists previously had, these atoms were thought to slowly diffuse upward through the atmosphere to a height where they could escape.
But that picture no longer accurately reflects the whole story, because now scientists know that atmospheric conditions change very quickly. When Mars is close to the Sun, the water molecules, which are the source of the hydrogen and deuterium, rise through the atmosphere very rapidly releasing atoms at high altitudes.
The second finding is that the changes in hydrogen and deuterium are so rapid that the atomic escape needs added energy to explain them. At the temperature of the upper atmosphere only a small fraction of the atoms have enough speed to escape the gravity of Mars. Faster (super-thermal) atoms are produced when something gives the atom a kick of extra energy. These events include collisions from solar wind protons entering the atmosphere or sunlight that drives chemical reactions in the upper atmosphere.
Mars was once a very wet planet. Scientists know that over the last 3 billion years, some of the water went underground, but what happened to the rest? Credit: NASA’s Goddard Space Flight Center; Lead Producer: Paul Morris; Mars Animations Producer: Dan Gallagher Serving as a Proxy
Studying the history of water on Mars is fundamental not only to understanding planets in our own solar system but also the evolution of Earth-size planets around other stars. Astronomers are finding more and more of these planets, but they’re difficult to study in detail. Mars, Earth and Venus all sit in or near our solar system’s habitable zone, the region around a star where liquid water could pool on a rocky planet; yet all three planets have dramatically different present-day conditions. Along with its sister planets, Mars can help scientists grasp the nature of far-flung worlds across our galaxy.
These results appear in the July 26 edition of Science Advances, published by the American Association for the Advancement of Science.
About the Missions
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 (STScI) in Baltimore, Maryland, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
MAVEN’s principal investigator is based at the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado Boulder. LASP is also responsible for managing science operations and public outreach and communications. NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the MAVEN mission. Lockheed Martin Space built the spacecraft and is responsible for MAVEN mission operations at Goddard. NASA’s Jet Propulsion Laboratory in Southern California provides navigation and Deep Space Network support. The MAVEN team is preparing to celebrate the spacecraft’s 10th year at Mars in September 2024.
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contacts:
Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, MD
claire.andreoli@nasa.gov
Ann Jenkins and Ray Villard
Space Telescope Science Institute, Baltimore, MD
Science Contact:
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Boston University, Boston, MA
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Last Updated Sep 05, 2024 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
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Hubble Space Telescope
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Hubble Science Highlights
MAVEN
The Mars Atmosphere and Volatile EvolutioN (MAVEN) mission is the first mission devoted to understanding the Martian upper atmosphere.
Mars
Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited…
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By NASA
A prototype of a robot built to access underwater areas where Antarctic ice shelves meet land is lowered through the ice during a field test north of Alaska in March. JPL is developing the concept, called IceNode, to take melt-rate measurements that would improve the accuracy of sea level rise projections.U.S. Navy/Scott Barnes Conducted through the U.S. Navy Arctic Submarine Laboratory’s biennial Ice Camp, this field test marked IceNode’s first in a polar environment. The team hopes to one day deploy a fleet of the autonomous robots beneath Antarctic ice shelves.U.S. Navy/Scott Barnes Called IceNode, the project envisions a fleet of autonomous robots that would help determine the melt rate of ice shelves.
On a remote patch of the windy, frozen Beaufort Sea north of Alaska, engineers from NASA’s Jet Propulsion Laboratory in Southern California huddled together, peering down a narrow hole in a thick layer of sea ice. Below them, a cylindrical robot gathered test science data in the frigid ocean, connected by a tether to the tripod that had lowered it through the borehole.
This test gave engineers a chance to operate their prototype robot in the Arctic. It was also a step toward the ultimate vision for their project, called IceNode: a fleet of autonomous robots that would venture beneath Antarctic ice shelves to help scientists calculate how rapidly the frozen continent is losing ice — and how fast that melting could cause global sea levels to rise.
Warming Waters, Treacherous Terrain
If melted completely, Antarctica’s ice sheet would raise global sea levels by an estimated 200 feet (60 meters). Its fate represents one of the greatest uncertainties in projections of sea level rise. Just as warming air temperatures cause melting at the surface, ice also melts when in contact with warm ocean water circulating below. To improve computer models predicting sea level rise, scientists need more accurate melt rates, particularly beneath ice shelves — miles-long slabs of floating ice that extend from land. Although they don’t add to sea level rise directly, ice shelves crucially slow the flow of ice sheets toward the ocean.
A remote camera captured an IceNode prototype deployed below the frozen surface of Lake Superior, off Michigan’s Upper Peninsula, during a field test in 2022. The three thin legs of the robot’s “landing gear” affix the prototype to the icy ceiling.NASA/JPL-Caltech The challenge: The places where scientists want to measure melting are among Earth’s most inaccessible. Specifically, scientists want to target the underwater area known as the “grounding zone,” where floating ice shelves, ocean, and land meet — and to peer deep inside unmapped cavities where ice may be melting the fastest. The treacherous, ever-shifting landscape above is dangerous for humans, and satellites can’t see into these cavities, which are sometimes beneath a mile of ice. IceNode is designed to solve this problem.
“We’ve been pondering how to surmount these technological and logistical challenges for years, and we think we’ve found a way,” said Ian Fenty, a JPL climate scientist and IceNode’s science lead. “The goal is getting data directly at the ice-ocean melting interface, beneath the ice shelf.”
Floating Fleet
Harnessing their expertise in designing robots for space exploration, IceNode’s engineers are developing vehicles about 8 feet (2.4 meters) long and 10 inches (25 centimeters) in diameter, with three-legged “landing gear” that springs out from one end to attach the robot to the underside of the ice. The robots don’t feature any form of propulsion; instead, they would position themselves autonomously with the help of novel software that uses information from models of ocean currents.
JPL’s IceNode project is designed for one of Earth’s most inaccessible locations: underwater cavities deep beneath Antarctic ice shelves. The goal is getting melt-rate data directly at the ice-ocean interface in areas where ice may be melting the fastest. Credit: NASA/JPL-Caltech Released from a borehole or a vessel in the open ocean, the robots would ride those currents on a long journey beneath an ice shelf. Upon reaching their targets, the robots would each drop their ballast and rise to affix themselves to the bottom of the ice. Their sensors would measure how fast warm, salty ocean water is circulating up to melt the ice, and how quickly colder, fresher meltwater is sinking.
The IceNode fleet would operate for up to a year, continuously capturing data, including seasonal fluctuations. Then the robots would detach themselves from the ice, drift back to the open ocean, and transmit their data via satellite.
“These robots are a platform to bring science instruments to the hardest-to-reach locations on Earth,” said Paul Glick, a JPL robotics engineer and IceNode’s principal investigator. “It’s meant to be a safe, comparatively low-cost solution to a difficult problem.”
Arctic Field Test
While there is additional development and testing ahead for IceNode, the work so far has been promising. After previous deployments in California’s Monterey Bay and below the frozen winter surface of Lake Superior, the Beaufort Sea trip in March 2024 offered the first polar test. Air temperatures of minus 50 degrees Fahrenheit (minus 45 Celsius) challenged humans and robotic hardware alike.
The test was conducted through the U.S. Navy Arctic Submarine Laboratory’s biennial Ice Camp, a three-week operation that provides researchers a temporary base camp from which to conduct field work in the Arctic environment.
As the prototype descended about 330 feet (100 meters) into the ocean, its instruments gathered salinity, temperature, and flow data. The team also conducted tests to determine adjustments needed to take the robot off-tether in future.
“We’re happy with the progress. The hope is to continue developing prototypes, get them back up to the Arctic for future tests below the sea ice, and eventually see the full fleet deployed underneath Antarctic ice shelves,” Glick said. “This is valuable data that scientists need. Anything that gets us closer to accomplishing that goal is exciting.”
IceNode has been funded through JPL’s internal research and technology development program and its Earth Science and Technology Directorate. JPL is managed for NASA by Caltech in Pasadena, California.
How NASA’s OMG found ocean waters are melting Greenland News Media Contact
Melissa Pamer
Jet Propulsion Laboratory, Pasadena, Calif.
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melissa.pamer@jpl.nasa.gov
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Last Updated Aug 29, 2024 Related Terms
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On 5/22/24, Chinmay Deval, the Water Security Lead at the SERVIR Science Coordination Office, moderated a virtual panel for the ResilienceLinks monthly webinar series. ResilienceLinks is the knowledge platform for the US Agency for International Development (USAID) Center for Resilience. The theme for May focused on Water Data and Climate Resilience. The panel featured distinguished water experts from the SERVIR global network, including: Jamilatou Chaibou Begou from the Agrometeorology, Hydrology, and Meteorology Regional Center/SERVIR West Africa, Chinaporn Meechaiya from the Asian Disaster Preparedness Center/SERVIR Southeast Asia, Jim Nelson, Principal Investigator of the SERVIR Applied Sciences Team at Brigham Young University, and Angelica Gutierrez from the National Oceanic and Atmospheric Administration (NOAA) Throughout the webinar, panelists shared their expertise and insights on the use of water data to enhance climate resilience. They discussed real-world applications, challenges in data accessibility, and innovative solutions for integrating local knowledge and gender equity into climate adaptation strategies. The webinar was hosted by Peter Epanchin, Senior Climate Adaptation and Resilience Advisor at USAID’s Bureau for Resilience, Environment, and Food Security.
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By NASA
5 Min Read NASA Returns to Arctic Studying Summer Sea Ice Melt
NASA's Gulfstream III aircraft taxis on the runway at Pituffik Space Base as it begins one of its daily science flights for the ARCSIX mission. Credits: NASA/Gary Banziger What happens in the Arctic doesn’t stay in the Arctic, and a new NASA mission is helping improve data modeling and increasing our understanding of Earth’s rapidly changing climate. Changing ice, ocean, and atmospheric conditions in the northernmost part of Earth have a large impact on the entire planet. That’s because the Arctic region acts like Earth’s air conditioner.
Much of the Sun’s energy is transported from tropical regions of our planet by winds and weather systems into the Arctic where it is then lost to space. This process helps cool the planet.
The NASA-sponsored Arctic Radiation Cloud Aerosol Surface Interaction Experiment (ARCSIX) mission is flying three aircraft over the Arctic Ocean north of Greenland to study these processes. The aircraft are equipped with instruments to gather observations of surface sea ice, clouds, and aerosol particles, which affect the Arctic energy budget and cloud properties. The energy budget is the balance between the energy that Earth receives from the Sun and the energy the Earth loses to outer space.
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This highlight video gives viewers a front row seat to a typical day on the ARCSIX mission from Pituffik Space Base as NASA's research scientists, instrument operators, and flight crews fly daily routes observing sea ice and clouds 750 miles north of the Arctic Circle in Greenland.NASA/Gary Banziger “More sea ice makes that air conditioning effect more efficient. Less sea ice lessens the Arctic’s cooling effect,” says Patrick Taylor, a climate scientist at NASA’s Langley Research Center in Hampton, Virginia. “Over the last 40 years, The Arctic has lost a significant amount of sea ice making the Arctic warm faster. As the Arctic warms and sea ice melts, it can cause ripple effects that impact weather conditions thousands of miles away, how fast our seas are rising, and how much flooding we get in our neighborhoods.”
As the Arctic warms and sea ice melts, it can cause ripple effects…thousands of miles away.
Patrick Taylor
NASA Climate Research Scientist
The first series of flights took place in May and June as the seasonal melting of ice started. Flights began again on July 24 during the summer season, when sea ice melting is at its most intense.
“We can’t do this kind of Arctic science without having two campaigns,” said Taylor, the deputy science lead for ARCSIX. “The sea ice surface in the spring was very bright white and snow covered. We saw some breaks in the ice. What we will see in the second campaign is less sea ice and sea ice that is bare, with no snow. It will be covered with all kinds of melt ponds – pooling water on top of the ice – that changes the way the ice interacts with sunlight and potentially changes how the ice interacts with the atmosphere and clouds above.”
Sea ice and the snow on top of the ice insulate the ocean from the atmosphere, reflecting the Sun’s radiation back towards space, and helping to cool the planet. Less sea ice and darker surfaces result in more of the Sun’s radiation being absorbed at the surface or trapped between the surface and the clouds.
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A pilot's view of Arctic sea ice from NASA's P-3 Orion aircraft during NASA's ARCSIX airborne science mission flights in June.NASA/Gary Banziger Understanding this relationship, and the role clouds play in the system, will help scientists improve satellite data and better predict future changes in the Arctic climate.
“This unique team of pilots, engineers, scientists, and aircraft can only be done by leveraging expertise from multiple NASA centers and our partners,” said Linette Boisvert, cryosphere lead for the mission from NASA’s Space Flight Center in Greenbelt, Maryland. “We gathered great data of the snow and ice pre-melt and at the onset of melt. I can’t wait to see the changes at the height of melt as we measure the same areas covered with melt ponds.”
NASA partnered with the University of Colorado Boulder for the ARCSIX mission, and the research team found some surprises in their early data analysis from the spring campaign. One potential discovery is something Taylor is calling a “sea ice sandwich”, when a younger layer of sea ice is caught in between two layers of older sea ice. Scientists also found more drizzle within the clouds than expected. Both observations will need further investigating once the data is fully processed.
A research scientist monitors data measurements in-flight during the spring campaign of the ARCSIX mission.NASA/Gary Banziger “A volcano erupted in Iceland, and we believe the volcanic aerosol plume was indicated by our models four days later,” Taylor said. “Common scientific knowledge tells us volcanic particles, like ash and sulfate, would have already been removed from the atmosphere. More work needs to be done, but our initial results suggest these particles might live in the atmosphere much longer than previously thought.”
Previous studies suggest that aerosol particles in clouds can influence sea ice melt. Data collected during ARCSIX’s spring flights showed the Arctic atmosphere had several aerosol particle layers, including wildfire smoke, pollution, and dust transported from Asia and North America.
“We got everything we hoped for and more in the first campaign,” Taylor added. “The data from this summer will help us better understand how clouds and sea ice behave. We’ll be able to use these results to improve predictive models. In the coming years, scientists will be able to better predict how to mitigate and adapt to the rapid changes in climate we’re seeing in the Arctic.”
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Last Updated Jul 26, 2024 EditorCharles G. HatfieldContactCharles G. Hatfieldcharles.g.hatfield@nasa.govLocationLangley Research Center Related Terms
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By NASA
4 Min Read California Teams Win $1.5 Million in NASA’s Break the Ice Lunar Challenge
By Savannah Bullard
After two days of live competitions, two teams from southern California are heading home with a combined $1.5 million from NASA’s Break the Ice Lunar Challenge.
The husband-and-wife duo of Terra Engineering, Valerie and Todd Mendenhall, receive the $1 million prize Wednesday, June 12, for winning the final phase of NASA’s Break the Ice Lunar Challenge at Alabama A&M’s Agribition Center in Huntsville, Alabama. With the Terra Engineering team at the awards ceremony are from left Daniel K. Wims, Alabama A&M University president; Joseph Pelfrey, NASA Marshall Space Flight center director; NASA’s Break the Ice Challenge Manager Naveen Vetcha; and Majed El-Dweik, Alabama A&M University’s vice president of research & economic development. NASA/Jonathan Deal Since 2020, competitors from around the world have competed in this challenge with the common goal of inventing robots that can excavate and transport the icy regolith on the Moon. The lunar South Pole is the targeted landing site for crewed Artemis missions, so utilizing all resources in that area, including the ice within the dusty regolith inside the permanently shadowed regions, is vital for the success of a sustained human lunar presence.
On Earth, the mission architectures developed in this challenge aim to help guide machine design and operation concepts for future mining and excavation operations and equipment for decades.
“Break the Ice represents a significant milestone in our journey toward sustainable lunar exploration and a future human presence on the Moon,” said Joseph Pelfrey, Center Director of NASA’s Marshall Space Flight Center. “This competition has pushed the boundaries of what is possible by challenging the brightest minds to devise groundbreaking solutions for excavating lunar ice, a crucial resource for future missions. Together, we are forging a future where humanity ventures further into the cosmos than ever before.”
The final round of the Break the Ice competition featured six finalist teams who succeeded in an earlier phase of the challenge. The competition took place at the Alabama A&M Agribition Center in Huntsville, Alabama, on June 11 and 12, where each team put their diverse solutions to the test in a series of trials, using terrestrial resources like gravity-offloading cranes, concrete slabs, and a rocky track with tricky obstacles to mimic the environment on the Moon.
Thehusband-and-wife duo of Terra Engineering took home the top prize for their “Irresistible Object” rover. Team lead Todd Mendenhall competed in NASA’s 2007 Regolith Excavation Challenge, facilitated through NASA’s Centennial Challenges, which led him and Valerie Mendenhall to continue the pursuit of solutions for autonomous lunar excavation.
Starpath Robotics earned the second place prize for its four-wheeled rover that can mine, collect, and haul material during the final phase of NASA’s Break the Ice Lunar Challenge at Alabama A&M’s Agribition Center in Huntsville, Alabama. From left are Matt Kruszynski, Saurav Shroff, Matt Khudari, Alan Hsu, David Aden, Mihir Gondhalekarl, Joshua Huang and Aakash Ramachandran.NASA/Jonathan Deal A small space hardware business, Starpath Robotics, earned the second-place prize for its four-wheeled rover that can mine, collect, and haul material. The team, led by Saurav Shroff and lead engineer Mihir Gondhalekar, developed a robotic mining tool that features a drum barrel scraping mechanism for breaking into the tough lunar surface. This allows the robot to mine material quickly and robustly without sacrificing energy.
“This challenge has been pivotal in advancing the technologies we need to achieve a sustained human presence on the Moon,” said Kim Krome, the Acting Program Manager for NASA’s Centennial Challenges. “Terra Engineering’s rover, especially, bridged several of the technology gaps that we identified – for instance, being robust and resilient enough to traverse rocky landscapes and survive the harsh conditions of the lunar South Pole.”
Beyond the $1.5 million in prize funds, three teams will be given the chance to use Marshall Space Flight Center’s thermal vacuum (TVAC) chambers to continue testing and developing their robots. These chambers use thermal vacuum technologies to create a simulated lunar environment, allowing scientists and researchers to build, test, and approve hardware for flight-ready use.
The following teams performed exceptionally well in the excavation portion of the final competition, earning these invitations to the TVAC facilities:
Terra Engineering (Gardena, California) Starpath Robotics (Hawthorne, California) Michigan Technological University – Planetary Surface Technology Development Lab (Houghton, Michigan) “We’re looking forward to hosting three of our finalists at our thermal vacuum chamber, where they will get full access to continue testing and developing their technologies in our state-of-the-art facilities,” said Break the Ice Challenge Manager Naveen Vetcha, who supports NASA’s Centennial Challenges through Jacobs Space Exploration Group. “Hopefully, these tests will allow the teams to take their solutions to the next level and open the door for opportunities for years to come.”
NASA’s Break the Ice Lunar Challenge is a NASA Centennial Challenge led by the agency’s Marshall Space Flight Center, with support from NASA’s Kennedy Space Center in Florida. Centennial Challenges are part of the Prizes, Challenges, and Crowdsourcing program under NASA’s Space Technology Mission Directorate. Ensemble Consultancy supports challenge competitors. Alabama A&M University, in coordination with NASA, supports the final competitions and winner event for the challenge.
For more information on Break the Ice, visit:
nasa.gov/breaktheice
Jonathan Deal
Marshall Space Flight Center, Huntsville, Ala.
256.544.0034
jonathan.e.deal@nasa.gov
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Last Updated Jun 13, 2024 LocationMarshall Space Flight Center Related Terms
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