88 modern constellations - a list of the current constellations. Former constellations - a list of former constellations. Chinese constellations List of Nakshatras - sectors along the moon's ecliptic Asterism (astronomy)

I know that Skygazing guide has a list of all the major constellations. They also have a list of all the circumpolar constellations also.

No, constellations cover the entire area of the sky.

Constellations are not stars. Groups of stars that look like they form various objects or shapes are called constellations.

See related link for a full list and pictorial