That interstellar traveler is none other than NASA's Voyager 1, which used its backup radio transmitter, which hasn't been activated since 1981, to send a message back to Earth. The message came after ...

Use left and right arrow keys to seek audio. NASA has confirmed that it has received a message from a spacecraft located more than 15 billion miles away from Earth. That spacecraft is none other than ...

Juice observed 3I/ATLAS during perihelion, when Earth-based telescopes could not. Spectroscopic observations measured water ...

WASHINGTON, July 3 (Reuters) - Astronomers are tracking a newly spotted comet hailing from parts unknown, only the third time such an interstellar object has been observed visiting our solar system.

Harvard scientist Avi Loeb wants to send a message to the interstellar object, which he claims could be an alien spacecraft that has come to probe Earth and the other planets. He has suggested sending ...