More How did the sun form? The sun formed around 4.5 billion years ago. At that time, the area of the Milky Way galaxy that would become the solar system was a dense cloud of gas — the leftovers ...

A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about . Then the planets began to emerge, as the billions of particles of gas and dust left ...

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same time, challenging current models of our solar system’s evolution.

This article was originally featured on The Conversation. Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A ...

Discover interesting facts about the sun, the solar system's central star that supports all life on Earth.