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

Stars that pass close to the solar system could pull planets out of alignment, sending them hurtling into the sun or out into ...

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner ...

The curious minds at What If investigate the cosmic chaos caused by swapping the orbits of certain planets in our solar ...

"How planets are born is an unsolved area of research," astrophysicist Daniel Price of Australia's Monash University told ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

Mar. 17, 2025 — A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new ... Webb Telescope Captures Its ...

The mystery of how planets and icy objects formed in the farthest reaches of our solar system just took an exciting turn. A ...

Indeed, other planets, dwarf planets and moons in our solar system do have seasonal cycles — and they can look wildly different from the ones we experience on Earth, experts told Live Science.

These types of exoplanets are some of the most common in our galaxy - but they've remained mysterious until now.

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our solar system.