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

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

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

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

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

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

Stargazers will be treated to a dazzling six-planet "alignment" this January.

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

Mars's atmosphere and climate are impacted by interactions with solar wind, a stream of plasma comprised of protons and ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show ...

Keep your eyes on the sky. Six planets in our solar system are coming into alignment and will be visible from Earth. AccuWeather says Saturn, Venus, Neptune, Uranus, Jupiter and Mars will be visible ...

offering insights that could reshape our understanding of the Earth-Moon system and the broader solar system. The ... A 'Remelting' of Lunar Surface Adds a Wrinkle to Mystery of Moon's True Age ...