Astronomy Picture of the Day . Barringer Crater on Earth . ... Usually nothing much, as most meteors are small, and indentations they make are soon eroded away. 49,000 years ago, however, a large meteor created Barringer Meteor Crater in Arizona, pictured above. ... This picture was snapped by the Voyager 2 spacecraft in 1986 - the only spacecraft ever to visit Uranus. ... But small irregular galaxies form stars too, like this lovely, gumdrop-shaped galaxy, Sextans A. Mars: A Sheer Close Up . ...