The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

Our solar system is on the move, traveling at 828,000 km/h through a galactic structure most people don't know exists. This ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A composite image comparing the relative sizes of our solar system's known dwarf planets, ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system ...

How common are Earth-like planets in the universe? When I started working on supernova explosions, I never imagined that my ...

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 ...

A rare image reveals a giant planet clinging to two stars, helping scientists understand how planets survive in chaotic star ...

I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system.

Even the best telescopes can’t see exoplanets. It’s all about watching for jiggly stars, blue shifts, and transits.

Astronomers are uncovering distant worlds beyond our solar system using ingenious indirect methods like observing stellar ...

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 cloud of ...