Discover the order of planets in the solar system. From Mercury to Neptune ... system formed about 4.6 billion years ago from a giant rotating cloud of gas and dust known as the solar nebula.

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

To understand how chaotic the early solar system was, we need only gaze at the moon. Its cratered surface bears the scars of ...

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

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new ...

Astronomers have found new evidence that a mysterious ninth planet may be hiding at the edge of the solar system - rewriting what we know about the cosmos again. An international team from Taiwan ...

One set of dots had matching colors and brightness. open image in gallery Is there a possible ninth planet in our solar system? Researchers say they may have found a candidate (Credit: ESO/Tom ...

Unlike most asteroids, which are composed of cosmic sediment, Vesta’s surface is volcanic basalt, indicating that it ...

For decades, scientists believed Vesta, one of the largest objects in our solar system's asteroid belt, wasn't just an ...