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

The so-called 'planetesimal belts' are filled with tiny millimeter-sized particles created by collisions between comets.

New research has revealed that Hot Jupiters do not always push away or destroy nearby planets during their migration. This ...

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

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event ...

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

Stargazers who haven't had a chance to check out this month's planet parade will want to look up soon because there's ...

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...

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

Skywatchers: A six-planet alignment peaks this week as Mars, Jupiter, Uranus, Neptune, Venus, and Saturn come together for ...