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 ...

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 ...

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.

The third known visitor from another star system, Comet 3I/ATLAS, has been racing through the Solar System with just enough weirdness to ignite a familiar debate: is it natural or could it be ...

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 ...

On the 1st of July 2025, the Asteroid Terrestrial-Impact Last Alert System (ATLAS) in Chile spotted a new comet entering our solar system. This comet was named 3I/ATLAS, as it's only the third ...

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 ...