Image:Terrestrial planet size comparisons.jpg
维基百科，自由的百科全书
| 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. |
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| Source |
http://solarsystem.nasa.gov/multimedia/gallery/terr_sizes.jpg Uploaded to commons from the english wikipedia; description page was here
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| Date |
20 March 2006 |
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| Author |
wikipedia user Brian0918 |
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| Permission |
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| Other versions | Image:Terestial planets comparisons.jpg / Image:Terrestrial planet size comparisons edit.jpg |
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| 定位 | 标准 |
|---|---|
| 水平解析度 | 300 dpi |
| 垂直解析度 | 300 dpi |
| 处理软件 | Adobe Photoshop 7.0 |
| 文件更改的日期与时间 | 14:20 2003年10月24日 |
| 颜色空间 | sRGB |
