The Manhattan-size interstellar object 3I/ATLAS will buzz past Mars this week — making its closest pass to any planet on its route as scientists are rushing to coordinate craft to observe the ...

The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.

3I/ATLAS is the third interstellar visitor ever to visit the solar system having been formed around a distant star. When you purchase through links on our site, we may earn an affiliate commission.

Interstellar Technologies ZERO rocket engine test-fired at Hokkaido Spaceport in Taiki, Hokkaido. It is fueled by liquid biomethane. Credit: Space.com | footage courtesy: Interstellar Technologies | ...