Fourth Rock from the Sun

  • Peter Grego
Part of the Astronomers' Observing Guides book series (OBSERVING)


Compared with most of the Solar System’s planets, Mars is a little on the small side. Measuring an average of 6,792 km in diameter, its dimensions lie neatly between that of the Earth and the Moon, making it the Solar System’s seventh smallest planet. Its surface area of 144,798,500 km² – some 28% of the Earth’s surface area – is roughly equivalent to the area of dry land on the Earth.


Solar System Dust Storm Dust Devil Axial Tilt Synodic Period 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Peter Grego
    • 1
  1. 1.CornwallUK

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