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Gaia spots possible moons around hundreds of asteroids
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By European Space Agency
Scientists created the most accurate three-dimensional map of star-formation regions in our Milky Way galaxy, based on data from the European Space Agency’s Gaia space telescope. This map will teach us more about these obscure cloudy areas, and the hot young stars that shape them.
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By NASA
Boarding passes will carry participants’ names on NASA’s Artemis II mission in 2026.Credit: NASA Lee este comunicado de prensa en español aquí.
NASA is inviting the public to join the agency’s Artemis II test flight as four astronauts venture around the Moon and back to test systems and hardware needed for deep space exploration. As part of the agency’s “Send Your Name with Artemis II” effort, anyone can claim their spot by signing up before Jan. 21.
Participants will launch their name aboard the Orion spacecraft and SLS (Space Launch System) rocket alongside NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen.
“Artemis II is a key test flight in our effort to return humans to the Moon’s surface and build toward future missions to Mars, and it’s also an opportunity to inspire people across the globe and to give them an opportunity to follow along as we lead the way in human exploration deeper into space,” said Lori Glaze, acting associate administrator, Exploration Systems Development Mission Directorate at NASA Headquarters in Washington.
The collected names will be put on an SD card loaded aboard Orion before launch. In return, participants can download a boarding pass with their name on it as a collectable.
To add your name and receive an English-language boarding pass, visit:
https://go.nasa.gov/artemisnames
To add your name and receive a Spanish-language boarding pass, visit:
https://go.nasa.gov/TuNombreArtemis
As part of a Golden Age of innovation and exploration, the approximately 10-day Artemis II test flight, launching no later than April 2026, is the first crewed flight under NASA’s Artemis campaign. It is another step toward new U.S.-crewed missions on the Moon’s surface that will help the agency prepare to send the first astronauts – Americans – to Mars.
To learn more about the mission visit:
https://www.nasa.gov/mission/artemis-ii/
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Rachel Kraft
Headquarters, Washington
202-358-1600
rachel.h.kraft@nasa.gov
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Last Updated Sep 09, 2025 LocationNASA Headquarters Related Terms
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By NASA
Explore This Section Overview Science Science Findings Juno’s Orbits Spacecraft People Stories Multimedia JunoCam Images Jupiter hosts the brightest and most spectacular auroras in the Solar System. Near its poles, these shimmering lights offer a glimpse into how the planet interacts with the solar wind and moons swept by Jupiter’s magnetic field. Unlike Earth’s northern lights, the largest moons of Jupiter create their own auroral signatures in the planet’s atmosphere — a phenomenon that Earth’s Moon does not produce. These moon-induced auroras, known as “satellite footprints,” reveal how each moon interacts with its local space environment.
Juno capturing the marks on Jupiter of all four Galilean moons. The auroras related to each are labeled Io, Eur (for Europa), Gan (for Ganymede), and Cal (for Callisto). NASA/JPL-Caltech/SwRI/UVS team/MSSS/Gill/Jónsson/Perry/Hue/Rabia Before NASA’s Juno mission, three of Jupiter’s four largest moons, known as Galilean moons — Io, Europa, and Ganymede — were shown to produce these distinct auroral signatures. But Callisto, the most distant of the Galilean moons, remained a mystery. Despite multiple attempts using NASA’s Hubble Space Telescope, Callisto’s footprint had proven elusive, both because it is faint and because it most often lies atop the brighter main auroral oval, the region where auroras are displayed.
NASA’s Juno mission, orbiting Jupiter since 2016, offers unprecedented close-up views of these polar light shows. But to image Callisto’s footprint, the main auroral oval needs to move aside while the polar region is being imaged. And to bring to bear Juno’s arsenal of instruments studying fields and particles, the spacecraft’s trajectory must carry it across the magnetic field line linking Callisto and Jupiter.
These two events serendipitously occurred during Juno’s 22nd orbit of the giant planet, in September 2019, revealing Callisto’s auroral footprint and providing a sample of the particle population, electromagnetic waves, and magnetic fields associated with the interaction.
Jupiter’s magnetic field extends far beyond its major moons, carving out a vast region (magnetosphere) enveloped by, and buffeted by, the solar wind streaming from our Sun. Just as solar storms on Earth push the northern lights to more southern latitudes, Jupiter’s auroras are also affected by our Sun’s activity. In September 2019, a massive, high-density solar stream buffeted Jupiter’s magnetosphere, briefly revealing — as the auroral oval moved toward Jupiter’s equator — a faint but distinct signature associated with Callisto. This discovery finally confirms that all four Galilean moons leave their mark on Jupiter’s atmosphere, and that Callisto’s footprints are sustained much like those of its siblings, completing the family portrait of the Galilean moon auroral signatures.
An international team of scientists led by Jonas Rabia of the Institut de Recherche en Astrophysique et Planétologie (IRAP), CNRS, CNES, in Toulouse, France, published their paper on the discovery, “In situ and remote observations of the ultraviolet footprint of the moon Callisto by the Juno spacecraft,” in the journal Nature Communications on Sept. 1, 2025.
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Last Updated Sep 02, 2025 Related Terms
Auroras Callisto Juno Jupiter Jupiter Moons Keep Exploring Discover More Topics From NASA
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By European Space Agency
In the past decade, the European Space Agency’s Gaia mission has revealed the nature, history, and behaviour of billions of stars. Our pioneering stargazer has reshaped our view of the skies around us like no other, revealing that star clusters are more connected than expected over vast distances.
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By European Space Agency
Astronomers using the NASA/ESA/CSA James Webb Space Telescope have found strong evidence of a giant planet orbiting a star in the stellar system closest to our own Sun. At just 4 light-years away from Earth, the Alpha Centauri triple star system has long been a compelling target in the search for worlds beyond our solar system.
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