Image:Terrestrial planet size comparisons.jpg

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Description

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.
Source

http://solarsystem.nasa.gov/multimedia/gallery/terr_sizes.jpg

Uploaded to commons from the english wikipedia; description page was here

  • 19:27, 20 March 2006 Brian0918 1500x653 (499,869 bytes)
Date

20 March 2006
Author

wikipedia user Brian0918
Permission
Public domain This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy).

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Other versions Image:Terestial planets comparisons.jpg / Image:Terrestrial planet size comparisons edit.jpg

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Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified image.

Orientation Normal
Horizontal resolution 300 dpi
Vertical resolution 300 dpi
Software used Adobe Photoshop 7.0
File change date and time 14:20, 24 October 2003
Color space sRGB
Retrieved from "http://en.wikipedia.org../../../t/e/r/Image%7ETerrestrial_planet_size_comparisons.jpg_17e8.html"