In October 2017, astronomers were surprised by an asteroid that came racing into our Solar System from interstellar space. Now, they have determined that this object, named ’Oumuamua, is unlike anything normally found in the Solar System. It appears to be a dark red, highly-elongated metallic or rocky object, about 1,312 feet (400 m) long. This artist’s impression shows the first interstellar asteroid — 1I/2017 U1 (’Oumuamua). Image credit:...
