Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

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

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

Not seen among the planets of our solar system, these are gassy worlds that, as their names imply, fall in size between that of Earth and Neptune. First discovered by NASA's Kepler space telescope ...

A 9th planet in our solar system might be found — and no, it’s not Pluto - Is there another planet out there? Researchers say ...

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

Pluto, which infamously lost its status as the ninth planet in 2006, is less than four billion miles away from the sun, sitting in the Kuiper Belt - a region in our solar system beyond Neptune ...

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