What is a Trojan asteroid? "asteroids that share an orbit with a planet near stable points in front of or behind the planet."
While the news is amazing, it tells me how little we humans know! We are still finding things in our own orbit! Yet, we expect discovering all sorts of things around Mars, Jupiter, Pluto! We have a lot to explore, to learn, to discover!
"Asteroid 2010 TK7 is circled in green, in this single frame taken by NASA's Wide-field Infrared Survey Explorer, or WISE. The majority of the other dots are stars or galaxies far beyond our solar system." Image credit: NASA/JPL-Caltech/UCLA.
Reference:
http://www.nasa.gov/mission_pages/WISE/news/wise20110727.html
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