By Hanneke Weitering SEATTLE — A cigar-shaped space rock named ‘Oumuamua caused quite a stir when it became the first interstellar visitor discovered in our solar system. Is it an asteroid, a comet or an alien spacecraft? While astronomers continue to work on answering these big questions, one thing has become certain: ‘Oumuamua probably isn’t that …
Published on January 18, 2019 08:28