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

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

All of our solar system’s planets are lining up to parade through the night sky ... Read more This mind-blowing map shows ...

Plate tectonics give Earth its mountains, earthquakes, continental drift and maybe even helped give rise to life itself. But ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

Astronomers have found some pretty wild exoplanets. Some are balls of lava the temperature of hell, one is partially made of ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Scientists found an intriguing world in our galaxy.

An exoplanet is a planet outside our solar system that usually orbits a star in our galaxy. More than 7,000 have been found ...

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