The surface of these celestial objects is a solid 
The surface of these celestial objects is a solid lattice of nuclei in which "starquakes" can occur, causing these objects to spin faster. If they emit electromagnetic radiation, their spinning causes the radiation to be observed at (*) regular intervals and these entities are known as pulsars. The core of a supernova can become, for 10 points, what type of very small, super-dense star named for a subatomic particle?
The surface of these celestial objects is a solid lattice of nuclei in which "starquakes" can occur, causing these objects to spin faster.