A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

To get somewhere in outer space, you can’t exactly drive in a straight line. Orbits are tricky things, and sending a probe to ...

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

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

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.

A planet parade is when several of our solar system's planets are visible in ... The planets can never fully line up exactly like you see in pictures, but they can all be on the same side of ...

until they settle into a thin layer — an essential step in the formation of planets like those in our own solar system. "These grains are only one millionth of a meter across — about the size ...

Scientists have been unable to determine whether the dwarf planet’s organics were produced by its own chemical processes or ...

One lucky East Lancashire stargazer caught a glimpse of the rare celestial phenomenon - the planetary alignment.

Over the next several weeks, astronomers will be looking closely at an asteroid called 2024 YR4 that could be as big as a ...

Incredibly powerful marsquakes that violently shake the red planet don't always begin under the surface, research shows.