This page uses content from Wikipedia and is licensed under CC BY-SA.

Portal:Mars

Introduction

Mars in natural color in 2007

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury. In English, Mars carries a name of the Roman god of war, and is often referred to as the "Red Planet" because the reddish iron oxide prevalent on its surface gives it a reddish appearance that is distinctive among the astronomical bodies visible to the naked eye. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth.

The rotational period and seasonal cycles of Mars are likewise similar to those of Earth, as is the tilt that produces the seasons. Mars is the site of Olympus Mons, the largest volcano and second-highest known mountain in the Solar System, and of Valles Marineris, one of the largest canyons in the Solar System. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Mars trojan.

Refresh with new selections below (purge)

Selected general articles

Did you know...

Need help?

Do you have a question about Mars that you can't find the answer to?

Consider asking it at the Wikipedia reference desk.

Get involved

For editor resources and to collaborate with other editors on improving Wikipedia's Mars-related articles, see WikiProject Mars.

Selected images

In the news

20 September 2018 – Climate of Mars, Atmosphere of Mars
The ExoMars Trace Gas Orbiter reveals dust devils in the Mars region Ariadnes Colles. New measurements indicate astronauts traveling to Mars would experience 60% of their recommended career exposure to radioactivity in a single roundtrip journey. (Cosmos Magazine) (IFLScience)

Categories

Topics

Associated Wikimedia

The following Wikimedia Foundation sister projects provide more on this subject:

Wikibooks
Books

Commons
Media

Wikinews 
News

Wikiquote 
Quotations

Wikisource 
Texts

Wikiversity
Learning resources

Wiktionary 
Definitions

Wikidata 
Database

Purge server cache