A rocky body spotted orbiting in Earth's path is a 'Trojan asteroid' that escorts our planet around the sun, astronomers have confirmed. Asteroid 2020 XL5 is the second Trojan asteroid ever discovered.
It's three times larger than the only other known Earth Trojan, called Asteroid 2010 TK7, which was confirmed in 2011 . These small space rocks orbit along with Earth, but they are hard to spot from our planet — Asteroid 2010 TK7 is sometimes on the other side of the sun from us. They sit…
Shared w/ STEREO-A appears to move ahead of the Earth, while STEREO-B falls behind the Earth, in their motion around the Sun. In this configuration, the two spacecraft are now passing near the two stable Lagrange Points, L4 and L5, of the Earth-Sun system
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