Greek letter alpha : α
What is another name for the second magnitude star "Alpha" in the Little Bear Constellation which is the nearest conspicuous star to the north celestial pole?
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)?