The color of the hottest stars is blue. You can tell the temperature of a star by looking at its color. The coolest stars are red, then orange, then yellow. Even hotter stars are white and then the hottest stars are blue.
What is the name for the gaseous region of a star which emits light and which extends into a star's surface until the gas becomes opaque?
What is a highly magnetized, rotating, neutron star emitting a beam of electromagnetic radiation that can only be observed when the beam of emission is pointing towards the Earth (known as the lighthouse effect)?
