Why do all the planets orbit in nearly the same plane? This episode explores the birth of the solar system from a collapsing ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. The size of the solar system is defined by the volume ...

Scientists have simulated what happens when a solar system pushes the limits of gravity and stability — and the results ...

As you're reading this, NASA's records read some 250 spacecraft sent into space, carrying with them either humans or our hopes for some revolutionary discovery. None of them have actually left our ...

And the earth was without form and void, and darkness was upon the face of the deep. Sometimes, if the night is dark and clear enough, you can look up and see the Milky Way in its arc across the sky.

We know of three interstellar objects (ISO) that have visited our inner solar system. Oumuamua was the first one, and it came ...

Jupiter's rapid early growth dramatically reshaped our solar system, scientists now reveal. Its immense gravity acted as a cosmic divider, separating ...

Astronomers say 3I/Atlas, the interstellar object passing through our solar system, has changed color again, raising new questions about its composition and behavior.

What are the weirdest worlds in our solar system, and how did they come to be? From a dwarf planet that looks like a deflated football, to a tiny moon with cliffs taller than Mt. Everest, to the ...