A cigar-shaped rock zooming through our Solar System — the first object from a foreign star system ever spotted in our midst ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration of an exoplanet in an alien star system.

Add Yahoo as a preferred source to see more of our stories on Google. For decades, humanity has scoured the cosmos for any signs ...

A newly identifiedplanetary system is forcing astronomers to rethink how worlds form and evolve, as a rocky planet appears where ...