The Gamma Cas Nebula and the Ghost Nebula

These nebulae are located in the constellation Cassiopeia. The blue star Navi spins around its axis at enormous speed - almost 400 km/s, which causes its mass to erupt, forming a thick ring of matter around the star. The star's strong ultraviolet radiation ionizes nearby nebulae, separating electrons from hydrogen atoms, releasing energy in the form of red light. The blue color in these nebulae is starlight reflected in the dust particles.