Aug 04 2011
Earth May Have Had Two Moons
A new theory suggests the two moons then crashed together, forming our current moon.
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Jul 26 2011
Remind Me Again, Why Isn’t Pluto a Planet?
In light of the discovery of a fourth moon orbiting Pluto, Mark Thompson ponders what it takes to be called a "planet."
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Jul 20 2011
Mysterious Moon ‘Swirls’: Nature’s Graffiti?
Despite nearly a half-century of intensive exploration by human and robots, the moon still has strange secrets for us to solve.
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Jul 20 2011
Hubble Discovers New Pluto Moon
Pluto may have been demoted to dwarf planet status, but it's queen bee to a clutch of moons that now number four.
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Jul 13 2011
Strip Mine the Moon to Fuel Space Exploration
Mining the moon would make access to space economical by bolstering new ventures, including space tourism, satellite refueling, and interplanetary voyages.
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Jun 22 2011
Enceladus May Possess Saltwater Ocean
NASA's Cassini spacecraft has already confirmed the Saturn moon contains a liquid water sub-surface ocean, but it has also found evidence that the ocean might be pretty salty.
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Jun 17 2011
Mars Moon Phobos Sails by Jupiter
Think the lunar eclipse was cool? Well, check out the view from Europe's Mars Express, which is the only known witness to a recent eclipse of Jupiter by the Martian moon Phobos.
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May 23 2011
Iapetus Fights the Battle of the Bulge
Why has the Saturnian moon got such an odd shape? It would seem Iapetus was spun up and smacked when it was young.
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May 12 2011
Jupiter’s Moon Conceals Ocean of Magma
Io is the most volcanically active body in the solar system, with about 100 volcanoes erupting at any one time.
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Mar 18 2011
Biggest Full Moon in Decades to Appear This Weekend
Moon gazers are in for a treat this weekend when the full moon will appear 14 percent bigger.
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