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Fraser
2011-Dec-21, 09:50 PM
In the fall of 2006, observers at the Catalina Sky Survey in Arizona found an object orbiting the Earth. At first, it looked like a spent rocket stage — it had a spectrum similar to the titanium white paint NASA uses on rocket stages that end up in heliocentric orbits. But closer inspection revealed that [...]

More... (http://www.universetoday.com/92022/earths-other-moons/)

Swift
2011-Dec-21, 09:57 PM
That's cool, as is the idea of a mission to one of these.