From our limited observation time, astronomers have determined ‘Oumuamua is a small cigar-shaped object, but we didn't know exactly how small until now. Share on Facebook (opens in a new window) Share ...

A mysterious cigar-shaped object spotted tumbling through our solar system last year may have been an alien spacecraft sent to investigate Earth, astronomers from Harvard University have suggested.

Now, researchers from the Harvard Smithsonian Center for Astrophysics have revived the idea that 'Oumuamua could be an alien spacecraft. While we've recategorized 'Oumuamua a few times, we can say ...

Our solar system's first known interstellar visitor may have a very violent origin story. The mysterious object 'Oumuamua, which was spotted zooming through the inner solar system in October 2017, is ...

The Vera Rubin telescope is poised to kick off an explosive era of discovery. "It's like old-fashioned astronomy: Find the thing, point telescopes at it, argue about it. It's going to be fun." ...

From the crash at Roswell to the mystery of ʻOumuamua, this documentary connects decades of UFO sightings, government files, close encounters and alien abductions into one gripping story — asking the ...