How many twilights are they and what are they called?

Answer 1

4.

The first one is called Twilight.

The second one is called New Moon

The third one is called Eclipse.

The fourth one is called Breaking Dawn.

Plus there is a novella called The Second Life Of Bree Tanner.

Answer 2

There are three different types of twilight: civil twilight, nautical twilight, and astronomical twilight. Civil twilight occurs when the sun is between 0 to 6 degrees below the horizon, nautical twilight occurs when the sun is between 6 to 12 degrees below the horizon, and astronomical twilight occurs when the sun is between 12 to 18 degrees below the horizon.