A visitor is hurtling through the void, a silent, ancient vagabond from an alien star system, and by the end of the week, it will make its closest ever approach to Earth. This is no ordinary comet; it ...

Stellar plasma can smear alien radio signals before they escape their star system, making them harder for astronomers to detect.

What happens if alien contact stops being science fiction and becomes real? From mysterious interstellar objects to the possibility of signals, peaceful arrival, or outright attack, the deeper ...

Scientists believe turbulent “space weather” around distant stars could be scrambling potential alien signals before they ...