Have you ever asked yourself why nearly all familiar planets have a round shape and not, say, the shape of a cylinder or a cube? 

Astronomers estimate that there could be trillions of them roaming our galaxy, but what exactly are they?

NASA's new James Webb Space Telescope has confirmed the existence of a rocky planet, dubbed LHS 475 b, of about the same size as Earth

Scientists suggested that about 3.4 billion years ago, Mars was hit by an asteroid similar to the one that hit Earth a little over 60 million years ago. It is believed that it hit the red planet in a shallow ocean region, causing a so-called megatsunami.

NASA scientists have found some fascinating new clues in the search for life on Mars. They revealed their findings in three new papers published in the peer-reviewed journal Science