What is Cassiopeia made of?

Cassiopeia is a constellation composed of asterisms, primarily made up of stars. The most prominent stars in Cassiopeia include Schedar, Caph, and Gamma Cassiopeiae, which are all primarily composed of hydrogen and helium. These stars vary in size and type, including red giants and blue supergiants. Additionally, the constellation contains various nebulae and star clusters, enriching its composition with gas and dust.