Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find ...

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

Delve into the wonders of Venus—the beautiful and extreme planet of our Solar System. Experience its stunning visuals in 4K resolution as we uncover its secrets, from its fiery surface to its ...

Astronomers gazing upon a star system not too far from Earth were recently treated to a marvelous discovery: a group of six planets moving around a sun-like star in a seemingly perfect cosmic ...

Astronomers using a pair of planet-hunting satellites discovered a solar system with at least six planets rotating around a star in perfect sync with each other.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Astronomers have discovered a rare synchronous solar system with six planets that all share various resonant orbits.

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 ...

A giant might lurk in the spherical region of ice and rock at the farthest reaches of our solar system. The odds aren't great, though.

There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s ...

All of the planets of the solar system are visible together in the night sky right now, providing stargazers with a "spectacular" show to end the year.