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 ...
Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...
Enaiposha, also known as GJ 1214 b, is an exoplanet orbiting the red dwarf Orkaria, located just 48 light-years from the ...
Asteroids are rocky objects that orbit the Sun, just like planets do. There are millions of asteroids of very different shapes and sizes. Some are almost spheres, like planets, but most are ...
Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds.
Just six light-years from the solar system — in cosmic terms, our backyard — exists a world about half the size ... planets. In addition to discovering Barnard’s b — a completely different ...
Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a subsurface ocean on the icy dwarf planet.