File:Terrestrial planet size comparisons right to left.jpg
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DescriptionTerrestrial planet size comparisons right to left.jpg |
English: This diagram shows the approximate relative sizes of the terrestrial planets, from right to left: Mercury, Venus, Earth and Mars. Distances are not to scale.
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. |
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Source | http://solarsystem.nasa.gov/multimedia/gallery/terr_sizes.jpg |
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Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:36, 3 June 2012 | 1,500 × 653 (116 KB) | החבלן (talk | contribs) |
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Orientation | Normal |
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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 |