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

NASA said the system is thought to be moving at least 1.2 million miler per hour, nearly twice as fast as our solar system.

Asteroids that orbit close to the Earth inevitably cause us some anxiety due to the even remote possibility of a collision.

“Our Solar System’s Kuiper Belt long appeared to ... for objects was complicated by being located in front of the dense background of the galaxy’s center. But now that it’s located in ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

The European Space Agency (ESA) has released an audio-visual representation of solar activity over the last three years, pulling data from its Solar Orbiter probe, which it runs with NASA.