If aliens are watching Earth, they might be able to detect us from the radio signals we beam to Mars to control our rovers there. Astronomers have now listened in on the nearby TRAPPIST-1 system to ...

A recent SETI Institute study suggests that space weather could blur and weaken extraterrestrial radio signals long before ...

Although no aliens were found, the results have helped constrain expectations of possible alien transmitter power. When you purchase through links on our site, we may earn an affiliate commission.

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 ...