The alien spaceship NASA claims isn't an alien spaceship is, in fact, still an alien spaceship – an expert has claimed. A back-and-forth battle between NASA and scientist Avi Loeb has been taking ...

Astronomers found no radio signals from the comet that would suggest it is an extraterrestrial spacecraft. 3I/ATLAS was confirmed as the third known object to enter our solar system from interstellar ...

Solar winds and coronal mass ejections may scatter narrow signals, making them harder for Earth-based telescopes to detect. The SETI Institute uses radio telescopes to search for signs of intelligent ...