- A Lunar eclipse is an eclipse when the Moon is covered by
- These happen when the Earth moves into a direct line between the
Sun and the Moon stopping all light from reaching the Moon.
- If it wasn't for the Moon's 5 degree inclination with respect to the
Earth-Sun plane, there would be a Lunar eclipse every full moon.
- The shadow that the Earth casts upon the Moon has two
- The main part of the shadow, which is directly in line with the
Sun, is called the Umbra.
- This is the point where all light from
the Sun is blocked out and a
total lunar eclipse
- The other region of shadow is called the Penumbra and
a partial eclipse.
- The shadow this casts is not as dark as the
Umbra and so only blocks out some of the sunlight.
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