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

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

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Astronomers believe they have spotted three undiscovered moons in our solar system, bringing the rough tally to around 293 natural satellites. The International Astronomical Union's Minor Planet ...

The James Webb Space Telescope has provided groundbreaking insights into a new type of exoplanet, fundamentally different ...

The research, yet to be peer-reviewed, sheds light on what could have changed the orbits of several planets in the solar ...

These moons were found orbiting the furthest planets in our solar system: one around Uranus ... the International Astronomical Union's Minor Planet Center announced on Friday.

Watch this video to find out more about the Earth, planets in our Solar System and other planets far off in outer space. From up here on the International Space Station I get a great view of Earth.

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but get a telescope and you can spot Neptune and Uranus.

Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds ...