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

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

The dwarf planet is a bizarre, cryovolcanic world. However, the organic deposits discovered on its surface so far are unlikely to originate from its interior. The organic material found in a few areas ...

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a ...