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Moon - Wikipedia, the free encyclopedia (5311 words) |
 | The plane of the lunar orbit maintains an inclination of 5.145 396° with respect to the ecliptic (the orbital plane of the Earth), and the lunar axis of rotation maintains an inclination of 1.5424° with respect to the normal to that same plane. |
| The points where the Moon's orbit crosses the ecliptic are called the "lunar nodes": the North (or ascending) node is where the Moon crosses to the North of the ecliptic; the South (or descending) node where it crosses to the South. |
| Lunar Prospector results, however, indicate the presence of hydrogen in the permanently shadowed regions, which could be in the form of water ice. |
| Lunar eclipse - Wikipedia, the free encyclopedia (865 words) |
| The type and length of a lunar eclipse depends upon the Moon's location relative to its orbital node. |
| If you were on the Moon's surface during a lunar eclipse you would witness a solar eclipse, with the Earth passing in front of the Sun. |
| Ancient Greek astronomers noticed that during lunar eclipses the edge of the shadow was always circular; they thus concluded that the Earth was spherical. |
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