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 ...

Earth is home to some truly bizarre and breathtaking landscapes — here are 20 that look straight out of an alien world.

STARGAZERS are in for a treat this month as a rare planet parade falls in Andromeda galaxy season. “One of the best planet ...

NASA’s Transiting Exoplanet Survey Satellite (TESS) has been used to discover Earth-size planet TOI 700 e. It is "orbiting ...

A dive into probabilities, asteroid impact modeling, and what sort of damage an approximately 180-foot asteroid could cause ...

From January to March, the night sky will host a spectacular parade of planets featuring Venus, Mars, Jupiter, Saturn, Uranus ...

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

A suspected planet that appears well-suited to life has had its existence confirmed – and it’s very much in our neighborhood, ...

The world's space agencies are keeping close watch on an asteroid heading our way, because there's currently a 1 in 83 chance ...

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests.

A small object, 2015 DJ155, roughly the size of the Statue of Liberty, is expected to pass by Earth on January 31, traveling ...