The universe is unimaginably vast, even within our own Solar System, the distances between planets are staggering. Light, the ...

The curious minds at What If explore what it would mean for life on Earth if every planet in our solar system were habitable.

Planets may begin forming much earlier than scientists once believed during the final stages of a star s birth, not afterward. This bold new model, backed by simulations from researchers at SwRI ...

This process, , is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

I am an astrophysicist and astrobiologist with over 20 years of experience studying extrasolar planets – which are planets beyond our solar system. You may like ...

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

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

Venus is the hottest planet in the solar system due to its thick carbon dioxide atmosphere, trapping heat as part of a runaway greenhouse effect.

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

Cheng discovered the object as part of an ongoing research project to identify TNOs and possible new planets in the outer solar system.

The internet has been abuzz with the possibility of sky watchers seeing a “smiley face” in the eastern sky above the horizon on Friday morning before dawn.

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Are planets in the solar system that are closer to the Sun older than the ones ...