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First asteroid companion of Earth discovered at last

from Space.com

The first in a long-sought type of asteroid companion to Earth has now been discovered, a space rock that always dances in front of the planet along its orbital path, just beyond its reach. The asteroid, called 2010 TK7, is nearly 1,000 feet (300 meters) across and currently leading the Earth by about 50 million miles (80 million kilometers). The asteroid is the first in a category known as Earth's Trojans, a family of space rocks that could potentially be easier to reach than the moon. The findings are detailed in the July 28 issue of Nature. more


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