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Terrestrial planet size comparisons.jpg

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Summary Edit

The terrestrial planets, from left to right: Mercury, Venus, Earth, and Mars. A terrestrial planet is a planet that is primarily composed of silicate rocks. The term is derived from the Latin word for Earth, "Terra", so an alternate definition would be that these are planets which are, in some notable fashion, "Earth-like". Terrestrial planets are substantially different from gas giants, which might not have solid surfaces and are composed mostly of some combination of hydrogen, helium, and water existing in various physical states. Terrestrial planets all have roughly the same structure: a central metallic core, mostly iron, with a surrounding silicate mantle. Terrestrial planets have canyons, craters, mountains, volcanoes and secondary atmospheres.

Licensing Edit

This file is licensed under the GFDL. Permission is granted to copy, distribute and/or modify this image under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. Subject to Wikia disclaimers.


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current20:41, April 21, 2007Thumbnail for version as of 20:41, April 21, 2007800 × 348 (41 KB)Eric Wester (Talk | contribs)The terrestrial planets, from left to right: Mercury, Venus, Earth, and Mars. A terrestrial planet is a planet that is primarily composed of silicate rocks. The term is derived from the Latin word for Earth, "Terra", so an alternate definition would be th

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