Eclipse phases

The visual phases observed during a total eclipse are called:
* First contact--when the Moon's limb (edge) is exactly tangential to the Sun's limb.
* Second contact--starting with Baily's Beads (caused by light shining through valleys on the Moon's surface) and the diamond ring effect. Almost the entire disk is covered.
* Totality--the Moon obscures the entire disk of the Sun and only the solar corona