Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

Although astronomers have directly imaged a few dozen gas giants on the scale of Jupiter, Earth-sized planets are too small and dim to be directly imaged. That's not to say there's a shortage of Earth ...

Some 350 light-years away, the V1298 Tau system features an infant sun-like star, just 23 million years old, orbited by four ...

The star system V1298 Tau reveals that many planets begin as large, low-density worlds that slowly shrink and shed their ...