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Mystery of 400-Year-Old Star Explosion Finally SolvedAstronomers have solved the puzzle of the companion that, along with a white dwarf, causes a Type 1a supernova.
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Rare Slow-Spinning Star Reveals Space OddityThe newly discovered pulsar appears to be older than the star explosion that created it.
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2011 Was the Year of the Restless SunThe sun finally woke up this year after a five-year slumber.
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Cosmic Autopsy Reveals Youngest Supernova's OriginsThe youngest supernova astronomers have seen provides clues about where it came from.
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Alien Planet Warps Its Solar SystemEven as the planet orbiting Beta Pictoris twists and kinks the debris disk around the star, the disk drags and distorts the orbit of the planet.
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Mystery of Mars Gullies SolvedThe gullies of Mars may have been cut by dust and sand cushioned on gaseous carbon dioxide.
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Alien Planet Is Rolling Over, Forcing 4 Others to Do SameThe massive planet 55 Cancri d flips itself upside-down and drags its four sibling planets along for the ride.
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Massive Black Hole Yields its Mysteries to AstronomersRefining the distance to the solar mass black hole in Cygnus X-1 allowed astronomers to precisely calculate its characteristics.
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Pluto's Moons Could Spell Danger for New Horizons SpacecraftHidden moons around Pluto could produce unforeseen hazards that could destroy NASA's New Horizons spacecraft.
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Black Hole's Cosmic Feasting Brings Bouts of BelchingAstronomers used NASA's WISE space telescope to take a detailed look at black hole jets.
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Jupiter Moon's Buried Lakes Evoke AntarcticaPuzzling features on Europa's surface could hide lakes of water beneath them.
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Why the Milky Way May Be Facing a Midlife CrisisThe Milky Way and its neighbor, the Andromeda galaxy, seem to be slowing down their rates of star formation.
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Astronomer Sleuth Solves Mystery of Big Cosmos DiscoveryDocuments reveal who cut key passages that could have trumped Edwin Hubble's discovery of the expansion of the universe.
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NASA Tracking Huge Asteroid with Radar for Tuesday EncounterAstronomers using radar to ping asteroids and other objects to learn more about them.
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Ancient Mars Water May Have Flowed UndergroundThe water in ancient Mars' past may have existed predominantly underground.
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A Day on Neptune Is Just 16 Hours Long, Study RevealsAstronomers have finally pinned just how long it takes for sunrise on Neptune.
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Wetter Mars Atmosphere Shakes Up Old Climate ModelsAstronomers studying the Martian atmosphere have found up to a hundred times more water than anticipated in the upper atmosphere.
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City-Size Neutron Stars Collide, Unleash Radio ShockwavesWhen two city-sized stars with solar-sized masses merge, the result is a high energy blast wave that lasts for months.
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Some Rocky Planets Could Have Been Born as Gas GiantsSuper-Earth planets may result from failed gas giants, a new theory suggests.
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Star's Bubbly Surface Reveals Cosmic Cooking BelowThe process of convection, which resembles boiling water, helps astronomers to understand what's happening deep inside of a pulsating star.
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Impossible Star Defies Astronomers' TheoriesA star from the Milky Way challenges theories of star formation.
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'Exotic Galaxy' With Black Hole Heart Wows AstronomersAstronomers have found a galaxy they've dubbed the 'missing link' of radio astronomy.
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Milky Way's Baby Stars Linked to Stellar Growth SpurtThe unique relationship between age and the pulsing of Cepheid variable stars allowed astronomers to determine that the star formation in the Milky Way more than tripled a few million years ago.
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New Look at Exploding Stars Provides Cosmic YardstickAstronomers studying supernovas narrowed down the likelihood of the pairings that produced them.
