The universe is simply huge, containing billions of stars, planets, and galaxies. When children get to know the enormity of space, a question that comes to mind is, if the universe is so big, why have ...

A team of astronomers found no radio signals from the comet that would suggest it is an extraterrestrial spaceship. The comet was confirmed in July 2025 as the third known object to enter our solar ...

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 ...