The size of the Solar System and the Universe is truly beyond our comprehension. When we think of the vastness of space, we ...

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 collapsing gas created our Sun, the first thing to ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

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

The solar wind flows outwards from the sun, past all the known planets, before finally slowing down and becoming subsonic (slower than the speed of sound) when it reaches the heliopause.

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Astronomers have spotted centimeter-sized “pebbles” swirling around two infant stars 450 light-years away, revealing the raw ...

There are 8 planets in our solar system. The planets orbit the Sun in elliptical trajectories, and they are all different in size, composition, temperature, and characteristics.

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. The ice line ...

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

(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 ...