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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA’s AVIRIS-3 airborne imaging spectrometer was used to map a wildfire near Cas-tleberry, Alabama, on March 19. Within minutes, the image was transmitted to firefighters on the ground, who used it to contain the blaze. NASA/JPL-Caltech, NASA Earth Observatory The map visualizes three wavelengths of infrared light, which are invisible to the human eye. Orange and red areas show cooler-burning areas, while yellow indicates the most intense flames. Burned areas show up as dark red or brown.NASA/JPL-Caltech, NASA Earth Observatory Data from the AVIRIS-3 sensor was recently used to create detailed fire maps in minutes, enabling firefighters in Alabama to limit the spread of wildfires and save buildings.
A NASA sensor recently brought a new approach to battling wildfire, providing real-time data that helped firefighters in the field contain a blaze in Alabama. Called AVIRIS-3, which is short for Airborne Visible Infrared Imaging Spectrometer 3, the instrument detected a 120-acre fire on March 19 that had not yet been reported to officials.
As AVIRIS-3 flew aboard a King Air B200 research plane over the fire about 3 miles (5 kilometers) east of Castleberry, Alabama, a scientist on the plane analyzed the data in real time and identified where the blaze was burning most intensely. The information was then sent via satellite internet to fire officials and researchers on the ground, who distributed images showing the fire’s perimeter to firefighters’ phones in the field.
All told, the process from detection during the flyover to alert on handheld devices took a few minutes. In addition to pinpointing the location and extent of the fire, the data showed firefighters its perimeter, helping them gauge whether it was likely to spread and decide where to add personnel and equipment.
As firefighters worked to prevent a wildfire near Perdido, Alabama, from reaching nearby buildings, they saw in an infrared fire map from NASA’s AVIRIS-3 sensor that showed the fire’s hot spot was inside its perimeter. With that intelligence, they shifted some resources to fires in nearby Mount Vernon.NASA/JPL-Caltech, NASA Earth Observatory “This is very agile science,” said Robert Green, the AVIRIS program’s principal investigator and a senior research scientist at NASA’s Jet Propulsion Laboratory in Southern California, noting AVIRIS-3 mapped the burn scar left near JPL by the Eaton Fire in January.
Observing the ground from about 9,000 feet (3,000 meters) in altitude, AVIRIS-3 flew aboard several test flights over Alabama, Mississippi, Florida, and Texas for a NASA 2025 FireSense Airborne Campaign. Researchers flew in the second half of March to prepare for prescribed burn experiments that took place in the Geneva State Forest in Alabama on March 28 and at Fort Stewart-Hunter Army Airfield in Georgia from April 14 to 20. During the March span, the AVIRIS-3 team mapped at least 13 wildfires and prescribed burns, as well as dozens of small hot spots (places where heat is especially intense) — all in real time.
At one of the Mount Vernon, Alabama, fires, firefighters used AVIRIS-3 maps to determine where to establish fire breaks beyond the northwestern end of the fire. They ultimately cut the blaze off within about 100 feet (30 meters) of four buildings.NASA/JPL-Caltech, NASA Earth Observatory Data from imaging spectrometers like AVIRIS-3 typically takes days or weeks to be processed into highly detailed, multilayer image products used for research. By simplifying the calibration algorithms, researchers were able to process data on a computer aboard the plane in a fraction of the time it otherwise would have taken. Airborne satellite internet connectivity enabled the images to be distributed almost immediately, while the plane was still in flight, rather than after it landed.
The AVIRIS team generated its first real-time products during a February campaign covering parts of Panama and Costa Rica, and they have continued to improve the process, automating the mapping steps aboard the plane.
‘Fan Favorite’
The AVIRIS-3 sensor belongs to a line of imaging spectrometers built at JPL since 1986. The instruments have been used to study a wide range of phenomena — including fire — by measuring sunlight reflecting from the planet’s surface.
During the March flights, researchers created three types of maps. One, called the Fire Quicklook, combines brightness measurements at three wavelengths of infrared light, which is invisible to the human eye, to identify the relative intensity of burning. Orange and red areas on the Fire Quicklook map show cooler-burning areas, while yellow indicates the most intense flames. Previously burned areas show up as dark red or brown.
Another map type, the Fire 2400 nm Quicklook, looks solely at infrared light at a wavelength of 2,400 nanometers. The images are particularly useful for seeing hot spots and the perimeters of fires, which show brightly against a red background.
A third type of map, called just Quicklook, shows burned areas and smoke.
The Fire 2400 nm Quicklook was the “fan favorite” among the fire crews, said Ethan Barrett, fire analyst for the Forest Protection Division of the Alabama Forestry Commission. Seeing the outline of a wildfire from above helped Alabama Forestry Commission firefighters determine where to send bulldozers to stop the spread.
Additionally, FireSense personnel analyzed the AVIRIS-3 imagery to create digitized perimeters of the fires. This provided firefighters fast, comprehensive intelligence of the situation on the ground.
That’s what happened with the Castleberry Fire. Having a clear picture of where it was burning most intensely enabled firefighters to focus on where they could make a difference — on the northeastern edge.
Then, two days after identifying Castleberry Fire hot spots, the sensor spotted a fire about 4 miles (2.5 kilometers) southwest of Perdido, Alabama. As forestry officials worked to prevent flames from reaching six nearby buildings, they noticed that the fire’s main hot spot was inside the perimeter and contained. With that intelligence, they decided to shift some resources to fires 25 miles (40 kilometers) away near Mount Vernon, Alabama.
To combat one of the Mount Vernon fires, crews used AVIRIS-3 maps to determine where to establish fire breaks beyond the northwestern end of the fire. They ultimately cut the blaze off within about 100 feet (30 meters) of four buildings.
“Fire moves a lot faster than a bulldozer, so we have to try to get around it before it overtakes us. These maps show us the hot spots,” Barrett said. “When I get out of the truck, I can say, ‘OK, here’s the perimeter.’ That puts me light-years ahead.”
AVIRIS and the Firesense Airborne Campaign are part of NASA’s work to leverage its expertise to combat wildfires using solutions including airborne technologies. The agency also recently demonstrated a prototype from its Advanced Capabilities for Emergency Response Operations project that will provide reliable airspace management for drones and other aircraft operating in the air above wildfires.
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4 min read Entrepreneurs Challenge Winner PRISM is Using AI to Enable Insights from Geospatial Data
NASA sponsored Entrepreneurs Challenge events in 2020, 2021, and 2023 to invite small business start-ups…
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
In our modern wireless world, almost all radio frequency (RF) spectrum bands are shared among multiple users. In some domains, similar users technically coordinate to avoid interference. The spectrum management team, part of NASA’s SCaN (Space Communications and Navigation) Program, represents the collaborative efforts across U.S. agencies and the international community to protect and enable NASA’s current and future spectrum-dependent science, exploration, and innovation.
Coordination with Other Spectrum Stakeholders
NASA works to promote the collaborative use of the RF spectrum around Earth, and beyond. For example, NASA coordinates closely with other U.S. government agencies, international civil space agencies, and the private sector to ensure missions that overlap in time, location, and frequency do not cause or receive interference that could jeopardize their success. The spectrum management team protects NASA’s various uses of the spectrum by collaborating with U.S. and international spectrum users on technical matters that inform regulatory discussions.
As a founding member of the Space Frequency Coordination Group, NASA works with members of governmental space- and science-focused agencies from more than 35 countries. The Space Frequency Coordination Group annual meetings provide a forum for multilateral discussion and consideration of international spectrum regulatory issues related to Earth, lunar, and deep space research and exploration. The Space Frequency Coordination Group also provides a forum for the exchange of technical information to facilitate coordination for specific missions and enable efficient use of limited spectrum resources in space.
Domestic and International Spectrum Regulators
Creating and maintaining the global spectrum regulations that govern spectrum sharing requires collaboration and negotiation among all its diverse users. The International Telecommunication Union manages the global spectrum regulatory framework to optimize the increasing, diverse uses of the RF spectrum and reduce the likelihood of RF systems experiencing interference. U.S. regulators at the National Telecommunications and Information Administration and the Federal Communications Commission are responsible for developing and administering domestic spectrum regulations. Organizations across the world cooperatively plan and regulate spectrum use. The spectrum management team participates on behalf of NASA at both national and international levels to ensure that the U.S. domestic and international spectrum regulatory framework supports and enables NASA’s current and future missions.
NASA collaborates with domestic and international spectrum stakeholders to provide technical expertise on space spectrum topics to ensure regulations continue to enable space exploration, science, and innovation.NASA Share
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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
As associate administrator for NASA’s Space Operations Mission Directorate Ken Bowersox puts it, “nothing happens without communications.”
And effective communications require the use of radio waves.
None of NASA’s exciting science and engineering endeavors would be possible without the use of radio waves to send data, communications, and commands between researchers or flight controllers and their flight platforms or instruments.
Reflecting on his time as a pilot, commander, and mission specialist during the Space Shuttle Program, Bowersox says, “If you’re not there physically, you can’t be a part of the team. But if you’re getting the data, whether it’s video, telemetry data with states of switches, or individual parameters on temperatures or pressures, then you can act on it and provide information to the spacecraft team so they can do the right thing in their operation.”
These vital data and communications functions, as well as the gathering of valuable scientific data through remote sensing applications, all use radio frequencies (RF) within the electromagnetic spectrum. NASA centers and facilities also use the RF spectrum to support their everyday operations, including the walkie-talkies used by security guards, air traffic control systems around airfields, and even office Wi-Fi routers and wireless keyboards.
Nothing happens without communications.
Ken Bowersox
NASA Astronaut & Associate Administrator for NASA's Space Operations Mission Directorate
All of NASA’s uses of the RF spectrum are shared, with different radio services supporting other kinds of uses. Service allocation is a fundamental concept in spectrum regulation and defines how the spectrum is shared between different types of applications. A service allocation defines ranges, or bands, of radio frequencies that can be used by a particular type of radio service. For example, a television broadcasting satellite operates in frequency bands allocated to the broadcasting satellite service, terrestrial cellular services operate in bands allocated for the mobile service, and the communications antennas on the International Space Station (ISS) operate in bands allocated to space operations service.
However, an allocation is not a license to operate — it does not authorize a specific system or operator to use particular frequencies. Such authority is granted through domestic and international regulatory processes.
Most frequency bands of the RF spectrum are shared, and each frequency band typically has two or more radio services allocated to it. Careful spectrum regulation, planning, and management aim to identify mutually compatible services to share frequency bands while limiting its negative impacts.
NASA’s Most Notable Spectrum Uses
Many of NASA’s most notable uses of spectrum rely on the following service allocations:
Earth exploration-satellite service Space research service Space operations service Inter-satellite service Note that allocations in the Earth exploration-satellite service and the space research service are designated either for communications links in the Earth-to-space, space-to-Earth, or space-to-space directions or designated for active or passive sensing of Earth or celestial objects (respectively) to differentiate the types of uses within the service and afford the requisite protections.
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Watch the video to learn more about how each kind of system uses the radio frequency spectrumNASA Learn how NASA manages its use of the RF spectrum. Learn about who NASA collaborates with to inform the spectrum regulations of the future. Learn about the scientific principles of the electromagnetic spectrum, including radio waves. Share
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Last Updated Apr 23, 2025 Related Terms
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NASA astronaut and Expedition 72 Flight Engineer Don Pettit sets up camera hardware to photograph research activities inside the International Space Station’s Kibo laboratory module on March 15, 2025.Credit: NASA Media are invited to a news conference at 2 p.m. EDT Monday, April 28, at NASA’s Johnson Space Center in Houston where astronaut Don Pettit will share details of his recent mission aboard the International Space Station.
The news conference will stream live on NASA’s website. Learn how to stream NASA content through a variety of platforms.
To participate in person, U.S. media must contact the NASA Johnson newsroom no later than 5 p.m. Thursday, April 24, at 281-483-5111 or jsccommu@mail.nasa.gov. Media wishing to participate by phone must contact the newsroom no later than two hours before the start of the event. To ask questions by phone, media must dial into the news conference no later than 10 minutes prior to the start of the call. NASA’s media accreditation policy is available online.
Questions also may be submitted on social media during the news conference by using #AskNASA. Following the news conference, NASA will host a live question and answer session with Pettit on the agency’s Instagram. For more information, visit @NASA on social media.
Pettit returned to Earth on April 19 (April 20, Kazakhstan time), along with Roscosmos cosmonauts Alexey Ovchinin and Ivan Vagner. Pettit celebrated his 70th birthday on April 20. He spent 220 days in space as an Expedition 71/72 flight engineer, bringing his career total to 590 days in space during four spaceflights. Pettit and his crewmates completed 3,520 orbits of Earth over the course of their 93-million-mile journey. They also saw the arrival of six visiting spacecraft and the departure of seven.
During his time on orbit, Pettit conducted hundreds of hours of scientific investigations, including research to enhance on-orbit metal 3D printing capabilities, advance water sanitization technologies, explore plant growth under varying water conditions, and investigate fire behavior in microgravity, all contributing to future space missions.
He also spent time aboard the space station sharing his photography, often posting images to his X account. He took more than 670,000 photos during his stay.
Learn more about International Space Station research and operations at:
http://www.nasa.gov/station
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Explore Hubble Science Hubble Space Telescope Eye on Infinity: NASA… 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 5 Min Read Eye on Infinity: NASA Celebrates Hubble’s 35th Year in Orbit
A selection of photogenic space targets to celebrate the 35th anniversary of NASA’s Hubble Space Telescope. Left to Right: Mars, a small portion of the Rosette Nebula, part of planetary nebula NGC 2899, barred spiral galaxy NGC 5335. Credits:
NASA, ESA, STScI; Image Processing: Joseph DePasquale (STScI), Alyssa Pagan (STScI) In celebration of the Hubble Space Telescope’s 35 years in Earth orbit, NASA is releasing an assortment of compelling images recently taken by Hubble, stretching from the planet Mars to star-forming regions, and a neighboring galaxy.
After more than three decades of perusing the universe, Hubble remains a household name — the most well-recognized and scientifically productive telescope in history. The Hubble mission is a glowing success story of America’s technological prowess, unyielding scientific curiosity, and a reiteration of our nation’s pioneering spirit.
“Hubble opened a new window to the universe when it launched 35 years ago. Its stunning imagery inspired people across the globe, and the data behind those images revealed surprises about everything from early galaxies to planets in our own solar system,” said Shawn Domagal-Goldman, acting director of the Astrophysics Division at NASA Headquarters in Washington. “The fact that it is still operating today is a testament to the value of our flagship observatories, and provides critical lessons for the Habitable Worlds Observatory, which we plan to be serviceable in the spirit of Hubble.”
Perched above Earth’s blurry atmosphere, Hubble’s crystal-clear views have been nothing less than transformative for the public’s perception of the cosmos. Through its evocative imagery, Hubble has made astronomy very relevant, engaging, and accessible for people of all ages. Hubble snapshots can portray the universe as awesome, mysterious, and beautiful — and at the same time chaotic, overwhelming, and foreboding.
A selection of photogenic space targets to celebrate the 35th anniversary of NASA’s Hubble Space Telescope. Upper left: Mars. Upper right: planetary nebula NGC 2899. Lower left: a small portion of the Rosette Nebula. Lower right: barred spiral galaxy NGC 5335. Image: NASA, ESA, STScI; Image Processing: Joseph DePasquale (STScI), Alyssa Pagan (STScI) The 24,000-pound observatory was tucked away inside the space shuttle Discovery’s cargo bay and lofted into low Earth orbit on April 24, 1990. As the shuttle Discovery thundered skyward, the NASA commentator described Hubble as a “new window on the universe.” The telescope turned out to be exactly as promised, and more.
More scientific papers than ever are based on Hubble data, thanks to the dedication, perseverance, and skills of engineers, scientists, and mission operators. Astronauts chased and rendezvoused with Hubble on five servicing missions in which they upgraded Hubble’s cameras, computers, and other support systems. The servicing missions took place from 1993 to 2009.
The telescope’s mission got off to a shaky start in 1990 when an unexpected flaw was found in the observatory’s nearly eight-foot diameter primary mirror. Astronauts gallantly came to the rescue on the first shuttle servicing mission in December 1993 to improve Hubble’s sharpness with corrective optics.
To date, Hubble has made nearly 1.7 million observations, looking at approximately 55,000 astronomical targets. Hubble discoveries have resulted in over 22,000 papers and over 1.3 million citations as of February 2025. All the data collected by Hubble is archived and currently adds up to over 400 terabytes, representing the biggest dataset for a NASA astrophysics mission besides the James Webb Space Telescope.
Hubble’s long operational life has allowed astronomers to return to the same cosmic scenes multiple times to observe changes that happened during more than three decades: seasonal variability on the planets in our solar system, black hole jets travelling at nearly the speed of light, stellar convulsions, asteroid collisions, expanding supernova bubbles, and much more.
Hubble’s Senior Project Scientist, Dr. Jennifer Wiseman, takes you on a tour of all four Hubble 35th anniversary images.
Credit: NASA’s Goddard Space Flight Center; Lead Producer: Paul Morris; Narrator: Dr. Jennifer Wiseman Before 1990, powerful optical telescopes on Earth could see only halfway across the cosmos. Estimates for the age of the universe disagreed by a big margin. Supermassive black holes were only suspected to be the powerhouses behind a rare zoo of energetic phenomena. Not a single planet had been seen around another star.
Among its long list of breakthroughs: Hubble’s deep field images unveiled myriad galaxies dating back to the early universe. The telescope also allowed scientists to precisely measure the universe’s expansion, find that supermassive black holes are common among galaxies, and make the first measurement of the atmospheres of exoplanets. Hubble also contributed to the discovery of dark energy, the mysterious phenomenon accelerating the expansion of universe, leading to the 2011 Nobel Prize in Physics.
The relentless pace of Hubble’s trailblazing discoveries kick-started a new generation of space telescopes for the 21st century. Hubble provided the first observational evidence that there were myriad distant galaxies for Webb to pursue in infrared wavelengths that reach even farther beyond Hubble’s gaze. Now, Hubble and Webb are often being used in complement to study everything from exoplanets to galaxy evolution.
Hubble’s planned successor, the Habitable Worlds Observatory, will have a significantly larger mirror than Hubble’s to study the universe in visible and ultraviolet light. It will be significantly sharper than Hubble and up to 100 times more sensitive to starlight. The Habitable Worlds Observatory will advance science across all of astrophysics, as Hubble has done for over three decades. A major goal of the future mission is to identify terrestrial planets around neighboring stars that might be habitable.
The Hubble Space Telescope 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, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
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Mosaic of Hubble 35th Anniversary Targets
A selection of photogenic space targets to celebrate the 35th anniversary of NASA’s Hubble Space Telescope. Upper left: Mars. Upper right: planetary nebula NGC 2899. Lower left: a small portion of the Rosette Nebula. Lower right: barred spiral galaxy NGC 5335.
Mars Near Opposition 2024
This is a combination of Hubble Space Telescope images of Mars taken from December 28th to 30th, 2024. Mars was approximately 61 million miles from Earth. Thin water-ice clouds that are apparent in ultraviolet light give the Red Planet a frosty appearance.
Planetary Nebula NGC 2899
This Hubble Space Telescope image captures the beauty of the moth-like planetary nebula NGC 2899. This object has a diagonal, bipolar, cylindrical outflow of gas propelled by radiation and stellar winds. The colors are from glowing hydrogen and oxygen.
Dark Clouds in Rosette Nebula
This is a Hubble Space Telescope photo of a small portion of the Rosette Nebula, a huge star-forming region spanning 100 light-years across and located 5,200 light-years away. Dark clouds of hydrogen gas laced with dust are silhouetted across the image.
Rosette Nebula Context Image
The Rosette Nebula is a vast star-forming region, 100 light-years across, that lies at one end of a giant molecular cloud. The background image is from the Digitized Sky Survey, while the inset is a small portion of the nebula as photographed by the Hubble Space Telescope.
NGC 5335
NASA’s Hubble Space Telescope captured in exquisite detail a face-on view of a remarkable-looking galaxy. NGC 5335 is categorized as a flocculent spiral galaxy with patchy streamers of star formation across its disk.
Mars Near Opposition Compass Image
These two images of Mars and its moon Phobos were captured by the Hubble Space Telescope’s Wide Field Camera 3 (WFC3) on consecutive days in December 2024. Compass arrows and a color key are provided for reference.
Planetary Nebula NGC 2899 Compass Image
This image of planetary nebula NGC 2899 was captured by the Hubble Space Telescope’s Wide Field Camera 3 (WFC3). The image shows a scale bar, compass arrows, and color key for reference.
Dark Clouds in Rosette Nebula Compass Image
This image of dark clouds in the Rosette Nebula was captured by the Hubble Space Telescope’s Wide Field Camera 3 (WFC3). The image shows a scale bar, compass arrows, and color key for reference.
NGC 5335 Compass Image
This image of barred spiral galaxy NGC 5335 was captured by the Hubble Space Telescope’s Wide Field Camera 3 (WFC3). The image shows a scale bar, compass arrows, and color key for reference.
Mars Rotation
This animation was assembled from a combination of Hubble Space Telescope images of Mars taken from December 28th to 30th, 2024. At the midpoint of the Hubble observations, Mars was approximately 61 million miles from Earth. The photos were then mapped onto a sphere, which is the…
Planetary Nebula NGC 2899
This video zooms across 6,500 light-years through a star-studding field to visit the planetary nebula NGC 2899, as photographed by the Hubble Space Telescope. The nebula has a diagonal bipolar structure formed by a cylindrical-shaped outflow of hot gasses and radiation from the c…
Rosette Nebula
This video offers a close-up look at a small portion of the magnificent Rosette Nebula, as photographed by the Hubble Space Telescope. Though Hubble cannot take three-dimensional pictures, this video is a visualization treatment of the photo to give a sense of depth with foregrou…
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Last Updated Apr 23, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Contact Media Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
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Ray Villard
Space Telescope Science Institute
Baltimore, Maryland
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