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As NASA prepares for its Artemis II mission, researchers at the agency’s Glenn Research Center in Cleveland are collaborating with The Australian National University (ANU) to prove inventive, cost-saving laser communications technologies in the lunar environment. Communicating in space usually relies on radio waves, but NASA is exploring laser, or optical, communications, which can send […]

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The Andromeda galaxy, also known as Messier 31 (M31), is the closest spiral galaxy to the Milky Way at a distance of about 2.5 million light-years. Astronomers use Andromeda to understand the structure and evolution of our own spiral, which is much harder to do since Earth is embedded inside the Milky Way. The galaxy […]

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Students attending the U.S. Space and Rocket Center Space Camp in Huntsville, Alabama, will have the chance to hear NASA astronauts aboard the International Space Station answer their prerecorded questions. At 12:40 p.m. EDT on Tuesday, July 1, NASA astronauts Anne McClain, Jonny Kim, and Nichole Ayers will answer student questions. Ayers is a space […]

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NASA astronaut Bob Hines took this picture of the waning crescent moon on May 8, 2022, as the International Space Station flew into an orbital sunrise 260 miles above the Atlantic Ocean off the northwest coast of the United States. Since the station became operational in November 2000, crew members have produced hundreds of thousands […]

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What are asteroids? Asteroids are rocky objects that orbit the Sun just like planets do. In fact, sometimes asteroids are called “minor planets.” These space rocks were left behind after our solar system formed about 4.6 billion years ago. Asteroids are found in a wide range of sizes. For example, one small asteroid, 2015 TC25, […]

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During his work on several historic missions, Casani rose through a series of technical and management positions, making an indelible mark on the nation’s space program.   John R. Casani, a visionary engineer who served a central role in many of NASA’s historic deep space missions, died on Thursday, June 19, 2025, at the age […]

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Editor’s note: This interview was conducted in October 2023.  As the International Space Station approaches 25 years of continuous human presence on Nov. 2, 2025, it is a meaningful moment to recognize those who have been there since the beginning—sharing the remarkable achievements of human spaceflight with the world.    If you have ever witnessed the […]

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The puzzling, fascinating surface of Jupiter’s icy moon Europa looms large in this newly-reprocessed color view, made from images taken by NASA’s Galileo spacecraft in the late 1990s. This is the color view of Europa from Galileo that shows the largest portion of the moon’s surface at the highest resolution. The view was previously released […]

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Explore This SectionScienceEuropa ClipperAlien OceanEuropa Clipper HomeMissionOverviewFactsHistoryTimelineScienceGoalsTeamSpacecraftMeet Europa ClipperInstruments Assembly Vault PlateMessage in a BottleNewsNews & FeaturesBlogNewsroomReplay the LaunchMultimediaFeatured MultimediaResourcesAbout EuropaWhy Europa?Europa Up CloseIngredients for LifeEvidence for an Ocean  To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoCould a liquid water ocean beneath the surface of […]

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This colorized image of Europa is a product of clear-filter grayscale data from one orbit of NASA’s Galileo spacecraft, combined with lower-resolution color data taken on a different orbit. The blue-white terrains indicate relatively pure water ice, whereas the reddish areas contain water ice mixed with hydrated salts, potentially magnesium sulfate or sulfuric acid. The […]