3I/ATLAS interstellar comet or alien spacecraft? This question gained attention after NASA released new images of comet 3I/ATLAS on 18 December. The images were captured by the Europa Clipper ...

The NASA/ESA Hubble Space Telescope reobserved interstellar comet 3I/ATLAS on 30 November with its Wide Field Camera 3 instrument. At the time, the comet was about 286 million kilometers from Earth.

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 ...

If they hadn’t finally shown themselves at the end of the movie—in a sky-filling, strobe-lit mother ship too awe-inspiring to conceal—there’s no doubt the U.S. government would have gone on hiding the ...

On Wednesday, David Grusch, a former military intelligence officer, told a House Oversight subcommittee that all those stories you’ve read on the internet are true: The government has debris collected ...