The Big Dipper is not made up of a specific kind of star, but rather a collection of stars with varying characteristics. Here's a breakdown:

* Dubhe (α Ursae Majoris): A giant orange star, the second brightest in the constellation Ursa Major (the Great Bear).

* Merak (β Ursae Majoris): A blue-white main sequence star.

* Phecda (γ Ursae Majoris): A white main sequence star.

* Megrez (δ Ursae Majoris): A white main sequence star.

* Alioth (ε Ursae Majoris): A blue-white main sequence star, the brightest star in Ursa Major.

* Mizar (ζ Ursae Majoris): A binary star system, with the brighter star being a blue-white main sequence star, and the companion a white main sequence star. Mizar also has a fainter optical companion, Alcor.

* Alkaid (η Ursae Majoris): A blue-white main sequence star, marking the end of the dipper's handle.

So, while some of the Big Dipper's stars are blue-white main sequence stars, others are giant or binary systems. The dipper is a mix of stars, making it a visually interesting and diverse celestial object.