In the early days of our solar system, when the Sun was still young and the planets were barely formed, Jupiter wasn’t the ...

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

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.

Once the quirky underdog of our solar system, Pluto held planetary status until 2006 ... the time it takes for Pluto to complete one full rotation on its axis, is about 153 Earth hours or 6.4 ...

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

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in ...