Phil defines eclipses and describes the different types of eclipses: Solar and Lunar. He explains how each type of eclipse occurs as well as what occurs in space during each eclipse. He defines the types of shadows, the Umbra and Penumbra, and how they affect the type of eclipse we experience on Earth.
A total solar eclipse happens somewhere on Earth once every year or two. What is an eclipse? Learn more about how solar eclipses happen, the four types of eclipses, and how to view the sun safely if you're within the path of totality.