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NASA's GALEX Reveals the Largest-Known Spiral Galaxy
Measuring tip-to-tip across its two outsized spiral arms, NGC 6872 spans more than 522,000 light-years, making it more than five times the size of our Milky Way galaxy.
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Kepler Discovers 461 New Planet Candidates
Four of the potential new planets are less than twice the size of Earth and orbit in the "habitable zone," where liquid water might exist.
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SOFIA Spots Recent Starbursts In Galaxy's Center
Researchers using NASA's SOFIA flying observatory capture new images of a huge ring of gas and dust surrounding the Milky Way's massive black hole.
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NASA, ESA Find Evidence for Vega Asteroid Belt
Astronomers have discovered what appears to be a large asteroid belt around the star Vega, the second brightest star in northern night skies.
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NASA Telescopes See Weather Patterns in Brown Dwarf
Astronomers using NASA's Spitzer and Hubble space telescopes have probed the stormy atmosphere of a brown dwarf, creating the most detailed "weather map" yet for this class of cool, star-like orbs.
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Hubble Reveals Rogue Planetary Orbit For Fomalhaut B
Newly released Hubble Space Telescope images of a vast debris disk encircling the nearby star Fomalhaut, and of a mysterious planet circling it, may provide forensic evidence of a titanic planetary disruption in the system.
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Galaxy's Gamma-Ray Flares Erupted Far From its Black Hole
Theorists expect gamma-ray outbursts occur only near a galaxy's central black hole. A few rare observations suggested otherwise.
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New Chandra Movie Features Neutron Star Action
Chandra's deep look at a rapidly rotating neutron star may provide new insight into the nature of some of the densest matter in the universe.
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NASA's NuSTAR Catches Black Holes in Galaxy Web
NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, set its X-ray eyes on a spiral galaxy and caught the brilliant glow of two black holes lurking inside.
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Armchair Science: Bag and Tag Glowing Galactic Clouds
Citizen scientists are invited to help astronomers by tagging clouds and holes in cosmic images from the Spitzer and Herschel space telescopes.