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

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

These two properties of axions mean that they are exceptionally good at collapsing down to incredibly high densities, pulled ...

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

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

If you were to perfectly follow the steps in An Idiot's Guide to Making a Solar System, you should eventually find yourself ...

Our sun is a lonely star. At least half the stars in our galaxy have binary companions. This was nicely illustrated in the ...

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

While claims of a “rare alignment” are overblown, you can still see up to six planets in the night sky this weekend. Here's ...

Astrophysicists have imaged a large number of exocomet belts around nearby stars, and the tiny pebbles within them. The crystal-clear images show light being emitted from these millimeter-sized ...