Researchers studying decades of earthquake data say they have found the first evidence that, in addition to spinning backward ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Is Earth truly the only place in our solar system where life exists? 🌍🛸 This video explores the conditions that make life ...

Earliest inner solar system planetesimals shaped the inventory of moderately volatile elements in terrestrial planets.

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of our Solar System. The planet sizes tested were 1 percent of Earth's mass, ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...