|Sidereal Period||687 days|
|Mean Distance from the Sun||227.9 million km|
|Sidereal Day||24.6 hours|
|Mean Surface Temperature||-53°C|
|Notes||The fourth major planet from the Sun, Mars is distinctive for its red-orange colouration, broken only by icy white at the poles. Its diameter is only about half that of Earth.|
The broken and icy north polar region of Mars. Prominent against the whiteness is the
dark gouge of the Chasma Boreale, the North Canyon.
The cold desert world of Mars lies further from the Sun than Earth. Considerably
smaller than our own planet, Mars' atmosphere consists mainly of carbon dioxide.
Mars has a diameter a little more than half that of
Earth. Nonetheless, because it has no oceans, its total
land surface is similar to that of our own planet.
A view down into the Valles Marineris, an immense complex of valleys more than 4,000 kilometres in length, running between the volcanic
plains of Tharsis and the densely cratered landscape of Chryse.
Key features on the western (top) and eastern (bottom) hemispheres of Mars.
eSky © copyright Mark Fisher 1999-2015
Surface maps courtesy Jet Propulsion Laboratory. Copyright © California Institute of Technology, Pasadena, CA. All rights reserved.