Detective astronomers have discovered at least one unseen alien planet, and possibly another, around a distant star by observing the odd behavior of a planet already known to orbit the same star. The ...

The atmospheres of alien planets can now be probed even if they are not illuminated by stars directly behind them, astronomers say. A new method used to scan the atmosphere of a distant "hot Jupiter" ...

Technosignatures are theoretical signs of technologically advanced alien civilizations, but so far, none of those civilizations have phoned home. Researchers from the Search for ExtraTerrestrial ...