PHYSICS 20A Lecture Notes - Lecture 5: Angular Diameter, Solar Eclipse, Corona
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By the way, a blue moon is actually the second full moon in one month, it"s not actually blue. Anywhere outside the penumbra has no eclipse at all: b: umbra. You"d only be in it (and see a total eclipse) for a few minutes. It follows the path of totality: c: total eclipse, annular eclipse. You"d see the solar corona in a total eclipse, a very hot gas surrounding the sun. The sun"s disk must be blocked by the moon in order to see it. Annular eclipse when the moon"s angular size isn"t big enough to cover the sun. The moon"s orbit isn"t a perfect circle distance from earth varies 13% in its orbit: d: partial eclipse, the further away a planet and its moon are, the smaller the sun would appear in the sky. A solar eclipse would eventually blot out the sun entirely: solar eclipses also only happen when the moon is a new moon.
