Question

what do astronomers call a neutron star that spins?
a pulsar
a white dwarf
a constellation
a supernova

Explanation:

A pulsar is a highly - magnetized, rotating neutron star that emits beams of electromagnetic radiation. White dwarfs are remnants of low - to medium - mass stars; constellations are groups of stars as seen from Earth; supernovas are massive explosions of stars.

Answer:

A. a pulsar