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By Dr. Howard Markel
The American space agency plans to announce details of the new expedition from its headquarters on Thursday.
By Nsikan Akpan
Despite decades of intense study, there is no general consensus on how most meteorites formed. An astronomer and a geologist offer a new theory of what happened during the solar system's birth to create these valuable relics of our past.
By William Herbst, James Greenwood, The Conversation
In his new books "Map to the Stars," Adrian Matejka writes about his childhood fixation on space, which offered a distraction from living in poverty.
By Elizabeth Flock
Most of us grew up thinking there were nine planets in the solar system, but that changed when Pluto got downgraded in 2006. Now there's news that there might be a ninth planet after all. Researchers have found evidence of…
By PBS NewsHour
By Justin Scuiletti
NASA is allowing you to engage in an extended gazing session at our planet's star this week with the release of a new video that reveals the sun -- rotation, solar flares and all -- in unprecedented detail. The…
After a 10-year journey, the space probe Rosetta is orbiting a comet. The spacecraft is slated to follow the comet for more than a year on its way toward the sun. Hari Sreenivasan talks to Mark McCaughrean, senior scientific advisor…
By Larisa Epatko
After a 10-year, 4-billion-mile journey, the European Space Agency’s Rosetta space probe reached its final destination on Wednesday: comet 67P/Churyumov-Gerasimenko.
Cassini spacecraft's cosmic photos bring the world 'along for the ride'…
Venus Transit: Explaining a Rare Phenomenon…
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