Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner ...

NASA believes that the month of May brings visibility to four planets, a new star from a nova, a chance of meteor showers and ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

Article continues below The solar system consists of the Sun, our home star, and everything that is bound to it by gravity: ...

Our solar system may have a ninth ... of a planet within the outskirts of the solar system is the activity within the Kuiper Belt, an unusual clustering of icy bodies -- including comets and dwarf ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn ... At the center is the sun, a yellow dwarf star that contains 99.8% of the solar ...

Indeed, other planets, dwarf planets and moons in our solar system do have seasonal cycles ... so "there's almost no seasonal change at all," Byrne said. On the opposite end of the spectrum ...