The Red Planet will be at its closest point to Earth, also known as perigee, on Jan. 12 and will be exactly opposite the sun on Jan. 15. It will be visible all night long because it will rise with the ...

Mars's moon Phobos is so strange that no one knows how it formed. But a forthcoming mission could solve this mystery - and a host of other puzzles connected to the solar system's deep past ...

The ‘Martian dichotomy’ is one of the Solar System’s greatest mysteries – but new research in closing in on a solution.

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

Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest.

Six planets are lining up in a row from our Earthly view of the cosmos, in a spectacle that'll be visible in January through to February.

Mars's atmosphere and climate ... "The expansion of the magnetosphere-ionosphere system can lead to atmospheric loss and enhanced interaction with solar radiation or cosmic rays.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Stock illustration of all the solar system's planets. Mars, Venus, Jupiter, Saturn, Uranus and Neptune will be visible all at once this month. Stock illustration of all the solar system's planets.

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