Astronomers still aren't exactly sure how planets get their start. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. If you want to build a planet, ...

See the ultimate guide to the Solar System from the dedicated people who sent spacecraft to explore the sun and the planets, and witness their astonishing tales of discovery as they reveal wonders ...

"The Solar Family" is an 11-minute educational film produced by Encyclopedia Britannica Films in 1936. It presents the evolution of the solar system through the lens of the planetesimal hypothesis, a ...

What's special about Chiron's rings is that they're still forming; this marks the first time astronomers have ever seen a ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...