Editorial: A planet just like home
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For however many millennia mankind has peered at the heavens, no one had ever identified a planet outside the solar system, and, being prone to extrapolating, many assumed no one ever would.
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NASAâs Messenger spacecraft has captured a new view of the planet Mercury.
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Astronomers have found a miniature version of our own solar system 5,000 light years across the galaxy â the first planetary system that really looks like our own.
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By Frank Ahrens, Washington Post Staff Writer
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Earth-like planets orbiting other stars may be far more common than had once been thought, a study suggests.
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Space scientists offer thoughts, both practical and far-fetched, for what to do if thereâs a space rock out there with our planetâs number on it.
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By ELLEN McCARTHY , THE WASHINGTON POST "Out here in space, the stars look peaceful, don't they?" Robert Redford's voice intones as the lights at Einstein Planetarium go from green to black and the universe opens up overhead.  They do.
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By By Brian Hendrickson, The Columbian, Vancouver, Wash.  Jun.
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Flip a coin. Heads, Earth is a common sort of planet. Tails, and ours is as unusual as a coin landing on edge. That's about the state of knowledge for scientists who ponder the question of our planet's rarity.
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10 billion years old Italian astronomers have detected a planet that survived the red giant expansion of its home star. The researchers say that the discovery could be a sneak peek at the fate that awaits the Earth, some four or five billion years from now.â¦
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New satellites may be able to continuously monitor the environment and take pictures of Earth.
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An asteroid with a wild orbit is about to zoom by our planet. Plus: Solving the mystery of the Pioneer anomaly could take decades.... A biologist finds a chunk of space shuttle Columbia. By Amit Asaravala.
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Astronomers find a strange new world that has them pondering again the essential properties of a planet.
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By Greg Avery, Daily Camera, Boulder, Colo.  Dec.
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By The Wisconsin State Journal  Dec. 12--The resilience of life on Earth continues to amaze and inspire.   And a little reassurance is probably needed, given such threats as  terrorism, global warming and bird flu.
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The planet isn't the only thing heating up because of climate change. Some renewable-energy stocks have been pretty hot, too.
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Astronomers have yet to find an Earth-size planet beyond our solar system, but that hasn&#39;t stopped them from modeling what these worlds might look like.