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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Gateway’s HALO module at Northrop Grumman’s facility in Gilbert, Arizona, on April 4, 2025, shortly after its arrival from Thales Alenia Space in Turin, Italy. NASA/Josh Valcarcel NASA continues to mark progress on plans to work with commercial and international partners as part of the Gateway program. The primary structure of HALO (Habitation and Logistics Outpost) arrived at Northrop Grumman’s facility in Gilbert, Arizona, where it will undergo final outfitting and verification testing.
HALO will provide Artemis astronauts with space to live, work, and conduct scientific research. The habitation module will be equipped with essential systems including command and control, data handling, energy storage, power distribution, and thermal regulation.
Following HALO’s arrival on April 1 from Thales Alenia Space in Turin, Italy, where it was assembled, NASA and Northrop Grumman hosted an April 24 event to acknowledge the milestone, and the module’s significance to lunar exploration. The event opened with remarks by representatives from Northrop Grumman and NASA, including NASA’s Acting Associate Administrator for Exploration Systems Development Lori Glaze, Gateway Program Manager Jon Olansen, and NASA astronaut Randy Bresnik. Event attendees, including Senior Advisor to the NASA Administrator Todd Ericson, elected officials, and local industry and academic leaders, viewed HALO and virtual reality demonstrations during a tour of the facilities.
Dr. Lori Glaze, acting associate administrator for NASA’s Exploration Systems Development Mission Directorate, and Dr. Jon B. Olansen, Gateway Program manager, on stage during an April 24, 2025, event at Northrop Grumman’s facility in Gilbert, Arizona, commemorating HALO’s arrival in the United States. Northrop Grumman While the module is in Arizona, HALO engineers and technicians will install propellant lines for fluid transfer and electrical lines for power and data transfer. Radiators will be attached for the thermal control system, as well as racks to house life support hardware, power equipment, flight computers, and avionics systems. Several mechanisms will be mounted to enable docking of the Orion spacecraft, lunar landers, and visiting spacecraft.
Launching on top of HALO is the ESA (European Space Agency)-provided Lunar Link system which will enable communication between crewed and robotic systems on the Moon and to mission control on Earth. Once these systems are installed, the components will be tested as an integrated spacecraft and subjected to thermal vacuum, acoustics, vibration, and shock testing to ensure the spacecraft is ready to perform in the harsh conditions of deep space.
In tandem with HALO’s outfitting at Northrop Grumman, the Power and Propulsion Element – a powerful solar electric propulsion system – is being assembled at Maxar Space Systems in Palo Alto, California. Solar electric propulsion uses energy collected from solar panels converted to electricity to create xenon ions, then accelerates them to more than 50,000 miles per hour to create thrust that propels the spacecraft.
The element’s central cylinder, which resembles a large barrel, is being attached to the propulsion tanks, and avionics shelves are being installed. The first of three 12-kilowatt thrusters has been delivered to NASA’s Glenn Research Center in Cleveland for acceptance testing before delivery to Maxar and integration with the Power and Propulsion Element later this year.
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Last Updated Apr 25, 2025 ContactLaura RochonLocationJohnson Space Center Related Terms
Artemis Artemis 4 Earth's Moon Exploration Systems Development Mission Directorate Gateway Space Station General Humans in Space Explore More
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By European Space Agency
The Atomic Clock Ensemble in Space (ACES), ESA’s state-of-the-art timekeeping facility, has been successfully installed on the International Space Station, marking the start of a new chapter in space-based precision science.
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By NASA
Jeremy Johnson, a research pilot and aviation safety officer, poses in front of a PC-12 aircraft inside the hangar at NASA’s Glenn Research Center in Cleveland on Thursday, April 17, 2025. Johnson flies NASA planes to support important scientific research and testing.Credit: NASA/Sara Lowthian-Hanna Jeremy Johnson laces his black, steel-toed boots and zips up his dark blue flight suit. Having just finished a pre-flight mission briefing with his team, the only thing on his mind is heading to the aircraft hangar and getting a plane in the air.
As he eases a small white-and-blue propeller aircraft down the hangar’s ramp and onto the runway, he hears five essential words crackle through his headset: “NASA 606, cleared for takeoff.”
This is a typical morning for Johnson, a research pilot and aviation safety officer at NASA’s Glenn Research Center in Cleveland. Johnson flies NASA planes to support important scientific research and testing, working with researchers to plan and carry out flights that will get them the data they need while ensuring safety.
Johnson hasn’t always flown in NASA planes. He comes to the agency from the U.S. Air Force, where he flew missions all over the world in C-17 cargo aircraft, piloted unmanned reconnaissance operations out of California, and trained young aviators in Oklahoma on the fundamentals of flying combat missions.
Jeremy Johnson stands beside a C-17 aircraft before a night training flight in Altus, Oklahoma, in 2020. Before supporting vital flight research at NASA through a SkillBridge fellowship, which gives transitioning service members the opportunity to gain civilian work experience, Johnson served in the U.S. Air Force and flew C-17 airlift missions all over the world.Credit: Courtesy of Jeremy Johnson He’s at Glenn for a four-month Department of Defense SkillBridge fellowship. The program gives transitioning service members an opportunity to gain civilian work experience through training, apprenticeships, or internships during their last 180 days of service before separating from the military.
“I think SkillBridge has been an amazing tool to help me transition into what it’s like working somewhere that isn’t the military,” Johnson said. “In the Air Force, flying the mission was the mission. At NASA Glenn, the science—the research—is the mission.”
By flying aircraft outfitted with research hardware or carrying test equipment, Johnson has contributed to two vital projects at NASA so far. One is focused on testing how well laser systems can transmit signals for communication and navigation. The other, part of NASA’s research under Air Mobility Pathfinders, explores how 5G telecommunications infrastructure can help electric air taxis of the future be safely incorporated into the national airspace. This work, and the data that scientists can collect through flights, supports NASA’s research to advance technology and innovate for the benefit of all.
Jeremy Johnson pilots NASA Glenn Research Center’s PC-12 aircraft during a research flight on Thursday, April 17, 2025.Credit: NASA/Sara Lowthian-Hanna “It’s really exciting to see research hardware come fresh from the lab, and then be strapped onto an aircraft and taken into flight to see if it actually performs in a relevant environment,” Johnson said. “Every flight you do is more than just that flight—it’s one little part of a much bigger, much more ambitious project that’s going on. You remember, this is a small little piece of something that is maybe going to change the frontier of science, the frontier of discovery.”
Johnson has always had a passion for aviation. In college, he worked as a valet to pay for flying lessons. To hone his skills before Air Force training, one summer he flew across the country in a Cessna with his aunt, a commercial pilot. They flew down the Hudson River as they watched the skyscrapers of New York City whizz by and later to Kitty Hawk, North Carolina, where the Wright brothers made their historic first flight. Johnson even flew skydivers part-time while he was stationed in California.
Jeremy Johnson in the cockpit of a PC-12 aircraft as it exits the hangar at NASA’s Glenn Research Center in Cleveland before a research flight on Thursday, April 17, 2025.Credit: NASA/Sara Lowthian-Hanna Although he’s spent countless hours flying, he still takes the window seat on commercial flights whenever he can so he can look out the window and marvel at the world below.
Despite his successes, Johnson’s journey to becoming a pilot wasn’t always smooth. He recalls that as he was about to land after his first solo flight, violent crosswinds blew his plane off the runway and sent him bouncing into the grass. Though he eventually got back behind the stick for another flight, he said that in that moment he wondered whether he had the strength and skills to overcome his self-doubt.
“I don’t know anyone who flies for a living that had a completely easy path into it,” Johnson said. “To people who are thinking about getting into flying, just forge forward with it. Make people close doors on you, don’t close them on yourself, when it comes to flying or whatever you see yourself doing in the future. I just kept knocking on the door until there was a crack in it.”
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By NASA
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
claire.andreoli@nasa.gov
Ray Villard
Space Telescope Science Institute
Baltimore, Maryland
Related Terms
Hubble Space Telescope Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Mars Nebulae Planetary Nebulae Planetary Science Planets Spiral Galaxies Stars The Solar System The Universe
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Hubble’s 35th Anniversary page
NASA Ciencia: Con la mirada en el infinito: La NASA celebra 35 años de la puesta en órbita del telescopio Hubble
ESA Hubble’s Story
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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
Hubble’s 35th Anniversary
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By European Space Agency
In celebration of the NASA/ESA Hubble Space Telescope’s 35 years in Earth orbit, an assortment of images that were recently taken by Hubble has been released today. This stretches from the planet Mars to images of stellar birth and death, and a magnificent neighbouring galaxy. After over three decades of scrutinising our Universe, Hubble remains a household word as the most well-recognised telescope in scientific history.
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