The surface of Venus is dry and rocky with lava ... Jupiter is so huge that it is twice as massive as all the other planets in the Solar System put together. Jupiter's stripy appearance is caused ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Earth-like exoplanets (planets orbiting stars other than our sun ... conditions suitable for liquid water under the planet’s surface. So-called subterranean oceans have already been found ...