Solar System

A 'false dusk' will be visible during twilight in February, but only from locations that are free of light pollution. Here's everything you need to know about zodiacal light.

In a cosmic coincidence, Venus — the planet named for the Roman goddess of love — will be at its brightest and best on Valentine's Day. Heres where and when to see it.

NASA's Juno spacecraft has discovered a giant volcanic hot spot on the surface of Jupiter's hellish moon Io. The eruptions in this area are chucking out six times the energy being produced by all Earth's power stations, researchers say.

Mercury takes only 88 Earth days to orbit the sun.

Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' dust storms, a new study suggests.

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even better view arrives in February and March. Here's what you need to know.

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 new study implies that in the past, moons in our solar system may have had rings just like planets do — deepening the mystery of why no ringed moons exist today.

Computer modeling suggests Saturn's rings are billions of years older than previous research suggests — but the new findings are up for debate.

A pair of massive thunderstorms have been spotted swirling in Jupiter's "South Equatorial Belt" and are likely unleashing massive bolts of green lightning. Some experts think the pale clouds could end up altering the rusty band's color — and potentially even making it "disappear."