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

Add Yahoo as a preferred source to see more of our stories on Google. Scientists are observing an Earth-like exoplanet that may contain water using NASA's James Webb Space Telescope, the space agency ...

Our solar system is a lot like the story of Goldilocks and the Three Bears. Planets that are located close to the sun can be too hot, while those located further from the sun can be too cold, making ...

Astronomers have discovered that "super-Earth" planets may exist on wider orbits than previously thought — and this implies these rocky, or "terrestrial," worlds are far more common than was suspected ...

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...