Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case Philippe Rekacewicz, UNEP/GRID-Arendal)
Calvin, J. Hamilton, Views of the Solar System, www.planetscapes.com; Bill Arnett, The nine planets: a multimedia tour of the solar system, www.seds.org/billa/tnp/nineplanets.html
Uploaded on Saturday 25 Feb 2012
Planets and atmospheres
Philippe Rekacewicz, UNEP/GRID-Arendal
A planet's climate is decided by its mass, its distance from the sun and the composition of its atmosphere. Mars is too small to keep a thick atmosphere. Its atmosphere consists mainly of carbon dioxide, but the atmosphere is very thin. The atmosphere of the Earth is a hundred times thicker.