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

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

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

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

Mars is home to perhaps the greatest mystery of the solar system: the so-called Martian dichotomy, which has baffled ...

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

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

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

The planet is the seventh largest and is currently inhabited solely by robots. However, the space agency is working hard to ...

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

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Pluto-Charon Formation Scenario Mimics Earth-Moon System Jan ... Dust storms on Mars could one day pose dangers to human astronauts, damaging equipment and burying solar panels.