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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Earth scientist Compton J. Tucker has been elected to the National Academy of Sciences for his work creating innovative tools to track the planet’s changing vegetation from space. It’s research that has spanned nearly 50 years at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, where he is a visiting scientist after retiring in March.
Tucker’s research began with identifying wavelengths of light that are absorbed or reflected as plants undergo photosynthesis, and has evolved into calculating the health and productivity of vegetation over time with satellites.
“I’m honored and surprised,” Tucker said of his election. “There were opportunities at the Goddard Space Flight Center that have enabled this work that couldn’t be found elsewhere. There were people who built satellites, who understood satellite data, and had the computer code to process it. All the work I’ve done has been part of a team, with other people contributing in different ways. Working at NASA is a team effort of science and discovery that’s fun and intellectually rewarding.”
Earth scientist Compton Tucker, who has studied remote sensing of vegetation at NASA Goddard for 50 years, has been elected to the National Academy of Sciences.Courtesy Compton Tucker Tucker earned his master’s and doctoral degrees from Colorado State University, where he worked on a National Science Foundation-funded project analyzing spectrometer data of grassland ecosystems. In 1975, he came to NASA Goddard as a postdoctoral fellow and used what he learned in his graduate work to modify the imager on National Oceanic and Atmospheric Administration (NOAA) meteorological satellites and modify Landsat’s thematic mapper instrument.
He became a civil servant at the agency in 1977, and continued work with radiometers to study vegetation – first with handheld devices, then with NOAA’s Advanced Very High Resolution Radiometer satellite instruments. He has also used data from Landsat satellites, Moderate Resolution Imaging Spectroradiometer instruments, and commercial satellites. His scientific papers have been cited 100,000 times, and one of his recent studies mapped 10 billion individual trees across Africa’s drylands to inventory carbon storage at the tree level.
“The impact of Compton Tucker’s work over the last half-century at Goddard is incredible,” said Dalia Kirschbaum, director of the Earth Sciences Division at NASA Goddard. “Among his many achievements, he essentially developed the technique of using satellites to study photosynthesis from plants, which people have used to monitor droughts, forecast crop shortages, defeat the desert locust, and even predict disease outbreaks. This is a well-deserved honor.”
Goddard scientist Compton Tucker’s work using remote sensing instruments to study vegetation involved field work in Iceland in 1976, left, graduate student research at Colorado State University in the early 1970s, top right, and analyzing satellite data stored on tape reels at Goddard.Courtesy Compton Tucker The National Academy of Sciences was proposed by Abraham Lincoln and established by Congress in 1863, charged with advising the United States on science and technology. Each year, up to 120 new members are elected “in recognition of their distinguished and continuing achievements in original research,” according to the organization.
In addition his role as a visiting scientist at Goddard, Tucker is also an adjunct professor at the University of Maryland and a consulting scholar at the University of Pennsylvania’s University Museum. He was awarded the National Air and Space Collins Trophy for Current Achievement in 1993 and the Vega Medal by the Swedish Society of Anthropology and Geography in 2014. He is a fellow of the American Association for the Advancement of Science and the American Geophysical Union, and won the Senior Executive Service Presidential Rank Award for Meritorious Service in 2017, among other honors.
By Kate Ramsayer
NASA’s Goddard Space Flight Center, Greenbelt, Md.
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Last Updated Jun 05, 2025 EditorErica McNameeContactKate D. Ramsayerkate.d.ramsayer@nasa.govLocationNASA Goddard Space Flight Center Related Terms
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By NASA
Jack Kaye [NASA HQ—Associate Director for Research, Earth Science Division (ESD)] has decided to retire on April 30, 2025, following 42 years of service to NASA – see Photo 1. Most recently, Kaye served as associate director for research of the Earth Science Division (ESD) within NASA’s Science Mission Directorate (SMD). In this position, he was responsible for the research and data analysis programs for Earth System Science that addressed the broad spectrum of scientific disciplines from the stratopause to the poles to the oceans.
Photo 1. Jack Kaye [NASA HQ—Associate Director for Research, Earth Science Division (ESD)] retired from NASA on April 30, 2025, after a 42-year career. Photo credit: Public Domain A New York native, Kaye’s interest in space was piqued as a child watching early NASA manned space launches on television. He would often write to NASA to get pictures of the astronauts. In high school, he started an after school astronomy club. Despite a youthful interest in Earth science, as he explained in a 2014 “Maniac Talk” at NASA’s Goddard Space Flight Center, Kaye pursued a slightly different academic path. He obtained a Bachelor’s of Science in chemistry from Adelphi University in 1976 and a Ph.D. in theoretical physical chemistry at the California Institute of Technology in 1982. For his graduate studies, he focused on the quantum mechanics of chemical reactions with an aim toward being able to understand and calculate the activity.
Following graduate school, Kaye secured a post-doctoral position at the U.S. Naval Research Laboratory, where he studied the chemistry of Earth’s atmosphere with a focus on stratospheric ozone. It was while working in a group of meteorologists at NASA’s Goddard Space Flight Center that Kaye returned to his roots and refocused his scientific energy on studying Earth.
“NASA had a mandate to study stratospheric ozone,” Kaye said in an interview in 2009. “I got involved in looking at satellite observations and especially trying to interpret satellite observations of stratospheric composition and building models to simulate things, to look both ways, to use the models and use the data.”
Kaye has held numerous science and leadership positions at NASA. He began his career at GSFC as a researcher for the Stratospheric General Circulation and Chemistry Modeling Project (SGCCP) from 1983–1990 working on stratospheric modeling. In this role, he also worked on an Earth Observing System Interdisciplinary proposal. His first role at NASA HQ was managing as program scientist for the Atmospheric Chemistry Modeling and Analysis Program (ACMAP), as well as numerous other missions. In this role, he was a project scientist for the Atmospheric Laboratory for Applications and Science (ATLAS) series of Shuttle missions. While managing ATLAS, Kaye oversaw the science carried out by a dozen instruments from several different countries. He also managed several other Earth Science missions during this time. See the link to Kaye’s “Maniac Talk.”
Kaye entered the Senior Executive Service in 1999, where he continued to contribute to the agency by managing NASA’s Earth Science Research Program. In addition, Kaye has held temporary acting positions as deputy director of ESD and deputy chief scientist for Earth Science within SMD. Throughout his career he has focused on helping early-career investigators secure their first awards to establish their career path—see Photo 2.
Photo 2. Throughout his career, Jack Kaye has been an advocate for young scientists, helping them get established in their careers. Here, Kaye speaks with the Climate Change Research Initiative cohort at the Mary W. Jackson NASA Headquarters building in Washington, DC on August 7, 2024. The Earth Science Division’s Early Career Research Program’s Climate Change Research Initiative is a year-long STEM engagement and experiential learning opportunity for educators and students from high school to graduate level. Photo Credit: NASA/Joel Kowsky On numerous occasions, Kaye spoke to different groups emphasizing the agency’s unique role in both developing and utilizing cutting-edge technology, especially remote observations of Earth with different satellite platforms – see Photo 3. With the launch of five new NASA Earth science campaigns in 2020, Kaye stated, “These innovative investigations tackle difficult scientific questions that require detailed, targeted field observations combined with data collected by our fleet of Earth-observing satellites.”
Photo 3. Jack Kaye hands out eclipse posters and other outreach materials to attendees at Eclipse Fest 2024. Photo credit: GRC https://science.nasa.gov/science-research/earth-science/looking-back-on-looking-up-the-2024-total-solar-eclipse/ Kaye has also represented NASA in interagency and international activities and has been an active participant in the U.S. Global Change Research Program (USGCRP), where he has served for many years as NASA principal of the Subcommittee on Global Change Research. He served as NASA’s representative to the Subcommittee on Ocean Science and Technology and chaired the World Meteorological Organization Expert Team on Satellite Systems. Kaye was named an honorary member of the Asia Oceania Geoscience Society in 2015. He previously completed a six-year term as a member of the Steering Committee for the Global Climate Observing System and currently serves an ex officio member of the National Research Council’s Roundtable on Science and Technology for Sustainability and the Chemical Sciences Roundtable, as well as a member of the Roundtable on Global Science Diplomacy.
NASA has honored Kaye with numerous awards, including the Distinguished Service Medal in 2022 and the Meritorious Executive in the Senior Executive Service in 2004, 2010, and 2021. In 2024 he was awarded the NASA-USGS Pecora Individual Award honoring excellence in Earth Observation. He was named a Fellow by the American Meteorological Society in 2010 and by the American Association of the Advancement of Science (AAAS) in 2014. Kaye was elected to serve as an office of the Atmospheric and Hydrospheric Science section of the AAAS (2015–2018). AGU has recognized him on two occasions with a Citation for Excellence in Refereeing.
Over the course of his career Kaye has published more than 50 papers, contributed to numerous reports, books, and encyclopedias, and edited the book Isotope Effects in Gas-Phase Chemistry for the American Chemical Society. In addition, he has attended the Leadership for Democratic Society program at the Federal Executive Institute and the Harvard Senior Managers in Government Program at the John F. Kennedy School of Government at Harvard University.
“The vantage point of space provides a way to look at the Earth globally, with the ability to observe Earth’s interacting components of air, water, land and ice, and both naturally occurring and human-induced processes,” Kaye said in a November 2024 article published by Penn State University. “It lets us look at variability on a broad range of spatial and temporal scales and given the decades of accomplishments, has allowed us to characterize and document Earth system variability on time scales from minutes to decades.”
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By NASA
Christina Zeringue is the chief safety and mission assurance officer at NASA’s Stennis Space Center. She is responsible for the safety and mission success of all activities, including rocket propulsion testing and operation of the NASA Stennis federal city.NASA/Danny Nowlin Christina Zeringue remembers being 10 years old, looking to the sky through her new telescope to view the Moon and planets on Christmas night. It opened her eyes to space and inspired her journey from the backyard to NASA’s Stennis Space Center near Bay St. Louis, Mississippi.
“I became fascinated with astronomy and learning about stars and constellations, the solar system and planetary orbits, solar and lunar eclipses, and challenging myself to find stars and nebula at different distances from Earth,” Zeringue said. “I was able to do and learn so much just from my own yard.”
She became obsessed with following the development and images produced from the Hubble Space Telescope, which launched on a space shuttle that featured three main engines tested at NASA Stennis.
Zeringue desired to learn more about the universe and find a way to be part of the effort to continue exploring. The Kenner, Louisiana, native ultimately made her way to NASA Stennis following graduation from the University of New Orleans.
As the NASA Stennis chief safety and mission assurance officer, Zeringue is responsible for safety and mission success of all site activities. These include both rocket propulsion testing and operation of the NASA Stennis federal city, where NASA and more than 50 federal, state, academic, public, and private aerospace, technology, and research organizations located onsite share in operating costs while pursuing individual missions.
Christina Zeringue enjoys viewing the partial solar eclipse on Oct. 14, 2023, from Slidell, Louisiana. NASA/Danny Nowlin “I have a broad range of responsibilities, which allows me to work with many talented people, pushes me to learn and develop new skills, and keeps my work interesting every day,” Zeringue said.
Zeringue’s work has supported NASA’s Artemis campaign to return astronauts to the Moon through her contributions to RS-25 engine testing and Green Run testing of NASA’s SLS (Space Launch System) core stage ahead of the successful launch of Artemis I.
The Pearl River, Louisiana, resident often encounters engineering or safety challenges where there is not a clear answer to the solution.
“We work together to understand new problems, determine the best course of action, and create new processes and ways to handle every challenge,” she said.
In total, Zeringue has worked 28 years at NASA Stennis – 14 as a contractor and 14 with NASA.
As a contractor, Zeringue initially worked as test article engineer for the Space Shuttle Main Engine Program. She followed that by serving as the quality systems manager, responsible for the quality engineering and configuration management of various engine systems, such as the space shuttle main engine, the RS-68 engine or Delta IV vehicles, and the J-2X upper stage engine.
Zeringue transitioned to NASA in 2011, first as a facility systems safety engineer and then as chief of the operations support division within the NASA Stennis Safety and Mission Assurance Directorate.
Her proudest career moment came early when working on final inspection of a new high pressure fuel turbopump. She noted a piece of contamination lodged behind the turbine shroud, which had been missed in previous inspections. Ultimately, the part was returned for disassembly before its next flight.
“While our post-test inspections can sometimes become routine, that day still stands out to me as a way that I really knew I directly contributed to the safety of our astronauts,” she said.
From the time Zeringue first looked through her new telescope, to her role as NASA Stennis chief safety and mission assurance officer, each moment along the way has contributed to the advice Zeringue shares with anyone considering a career with NASA. “Stay curious, invest in your own development, share your expertise with others, and try something new every day,” she said.
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By NASA
5 Min Read Career Spotlight: Mathematician (Ages 14-18)
What does a mathematician do?
Mathematicians use their expert knowledge of math to solve problems and gain new understanding about how our world works. They analyze data and create mathematical models to predict results based on changes in variables. Many different fields rely heavily on math, such as engineering, finance, and the sciences.
Using math to solve real-world problems is called “applied math.” This is different from “abstract math,” which refers to the study of the structure of mathematics.
At NASA, applied math enables new discoveries in space science, astronomy, and aeronautics. For example, professionals might use math techniques to calculate the mass or thrust capability of rockets. Others might work to analyze calorie and food consumption rates aboard the International Space Station. Math is also central to physics and astronomy roles.
Brent Buffington, Europa Clipper’s mission design manager, working on the spacecraft’s trajectory in his office at NASA’s Jet Propulsion Laboratory in Southern California. Credit: NASA/Jay R. Thompson What are some NASA careers that rely on mathematics?
Astronomer: Uses skills in advanced math and physics, computer programming, and more to learn about the universe. Mathematical modeler: Uses math to create models that help explain or predict how processes behave over time. Electrical engineer: Relies on trigonometry, calculus, and other math skills to design, test, and operate electrical systems. Data analyst: Uses skills such as algebra and statistics to find meaningful patterns in data. Computer scientist: Writes code that involves math, programming, data processing, and the use of special software for complex operations. A technician works on the X-59 model during testing in the low-speed wind tunnel at Lockheed Martin Skunk Works in Palmdale, California. These tests provided measurements of wind flow angle around the aircraft’s nose and confirmed computer predictions made using computational fluid dynamics software tools. This is part of NASA’s Quesst mission, which plans to help enable supersonic air travel over land.Credit: Lockheed Martin How can I get a job using applied math skills?
If you have an affinity for math, high school is a good time to grow those skills. Taking challenging math courses will help build a strong foundation. Participating in extracurricular activities that use math, such as robotics teams or engineering clubs, will also provide helpful opportunities to apply and hone your skills.
Careers in applied math vary widely. The type of math skills you’ll need depends on which career you’re interested in – such as astronomer or engineer – and what mathematical tools you’ll need in that job. Students may pursue a degree in applied mathematics or in their chosen field, knowing they will need to take math courses. Current job openings, guidance counselors, and mentors can shed light on the best academic path. With this information, you can begin planning for the skills and education you’ll need.
Most math-heavy careers will require at least a four-year degree in the student’s primary field of study along with several college-level math courses. Other careers may require a master’s or Ph.D.
How can I start preparing today to become a mathematician?
Ready to start flexing your math muscles? NASA STEM provides a variety of hands-on activities you can use to practice applying math principles to real-world situations in space exploration and aviation. These activities are available for a variety of ages and skill levels. NASA also hosts student challenges and competitions that offer great experience for those looking to level up their applied math skills and make genuine contributions to helpful new technologies.
NASA also offers paid internships for U.S. citizens aged 16 and up. Interns work on real projects with the guidance of a NASA mentor. Internship sessions are held each year in spring, summer, and fall; visit NASA’s Internships website to learn about important deadlines and current opportunities.
Participants in the 25th Annual NASA Planetary Science Summer School work together on a mathematical project.NASA Advice from NASA mathematicians
Ask yourself if you enjoy mathematics and if you like problem solving and puzzles. Mathematics careers rarely involve “crunching numbers,” but rather thinking of ideas and theories (for theoretical mathematics) or how to manage data, graphics, machine learning, and related computer and data skills (for applied mathematics).
– Jennifer Wiseman, senior astrophysicist, Hubble Space Telescope Research specific fields where mathematics is applied (data science, engineering, finance) and seek internships or shadowing opportunities to experience these environments firsthand. Connect with math professionals for informational interviews and join mathematical communities or organizations related to areas that interest you.
– Justin Rice, Earth Science Data and Information Systems deputy project manager, Data Systems Curiosity, willingness to learn, and good communication skills (writing, speaking, illustrating) are important. The last is because although numbers and data are cool, the real magic is being able to interpret them in a way that helps people make business or policy decisions that improve people’s lives.
– Nancy Carney, allocation specialist, NASA High-End Computing “Big Data” jobs are one area that might be very active in terms of internships, as there is huge demand for people who can help to process the incredible amounts of data that are being created in various areas. These include space science, but also everyday areas, as companies across the board build up huge customer datasets and seek ways to analyze and interpret that information.
– Kenneth Carpenter, Hubble Space Telescope operations project scientist and Nancy Grace Roman Space Telescope ground system scientist
Additional Resources
Space Math @ NASA
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By NASA
1 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
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