Size of the earth in relation to that of moon
Orbit of moon around earth
Direction of rotation of earth around sun
Area of the sun covered by the moon
- A lunar eclipse occurs when Earth comes directly between the Sun and Moon, so that Earth’s shadow falls on the Moon.
- A solar eclipse occurs when the Moon comes directly between the Sun and Earth, so that the Moon’s shadow falls on Earth.
- If the Moon were in a perfectly circular orbit, a little closer to the Earth, and in the same orbital plane, there would be total solar eclipses every new moon. However, since the Moon’s orbit is tilted at more than 5 degrees to the Earth’s orbit around the Sun, its shadow usually misses Earth.
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