Eclipsing By Ben delzer

Solar and Lunar eclipses do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth. Only when the Moon is crossing the plane of the Earth's orbit just as it is lining up with the Earth and Sun will an eclipse occur. The moon is on a 5% inclined plane. A full solar eclipse is when you are in the umbra of the eclipse and can only see the corona of the Sun. A partial eclipse is when you are in the penumbra of the eclipse and only part of the sun is covered up.
A lunar eclipse happens when the Earth, Moon, and Sun align with the Moon behind the Earth. This is during a new moon. The Earth casts a shadow (called the umbra) that darkens the moon and sometimes makes it red - ish.
A Solar Eclipse happens when the Sun,Moon, and Earth are in a line with the moon in front of the Earth. This is during a new moon. The moon when viewed from the Earth completely obscures the sun. This phenomenon is called a solar eclipse. The full shadow (umbra) is what obscures the sun from where you are. The penumbra is a partial shadow which results in a partial eclipse.

What is penumbra and umbra?

Penumbra is the shadow cast by the earth or moon over an area experiencing a partial eclipse. An umbra is the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.


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