News Astronomy

We still don’t know where the first interstellar asteroid came from

Clues from ‘Oumuamua’s speed and trajectory lead to answers all over the sky map

illustration of 'Oumuamua

ALIEN ASTEROID  This artist’s representation of interstellar asteroid ‘Oumuamua shows its unusual shape: 400 meters long and just about 40 meters wide. No asteroids in the solar system are shaped like that. 

M. Kornmesser/European Southern Observatory

By Lisa Grossman

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