If the ring is confirmed to be created by a meteorite impact, the crater could be a major ... structures are often spotted on ...

I am predisposed to like videos about meteorite craters but this was even more interesting than I anticipated. A nice example ...

an asteroid came within 17,200 miles of Earth, the closest approach for an an object of this size. A day later, Bay Area residents reported seeing a fireball streaking through the sky. A map ...