First [may be partial] is: A Cephid Variable Star. Quasars and other Gamma Ray sources [colliding Neutron Stars, and 'coalescing' Pairs of Black Holes for example] are also closely related.
Only a relatively massive star can become a neutron star (pulsar). Smaller stars become a white dwarf, once they stop producing energy.
Pulsar is another name for a neutron star. It's a dead star - the remainder of a star of a fairly high mass.
Pulsars are a form of neutron stars.
Constellations
clusters, constellations
Gravel, organic matter, sand.
All things, except black holes, are luminous. That includes stars. You might think that some other things are not luminous but that's because you can't see the kinds of light that they emit.
Oxygen is produced through repeated hydrogen fusion in stars. One such process would start with the hydrogen atoms fusing to form helium. And then the helium would fuse to form beryllium. That in turn would fuse to create oxygen.
Pulsars are located every where around the universe keep in mind pulsars are neutron stars so that means they were formed by large stars that have aged and died out
Pulsars are rapidly rotating neutron stars that emit beams of electromagnetic energy. Neutron stars form when the core of a massive star collapses and goes supernova leaving behind a neutron star which will begin rotating and releasing energy.
The collapse of massive stars - the same as neutron stars.
Yes. All pulsars and neutron stars are the remnants of a supernova explosion.
Because I am interested in neutron stars.
pulsars
Pulsars are not only a kind of neutron star, they are neutron stars. See related question.
The short length of pulsar pulses eliminate normal stars as possible pulsars because normal stars do not have strong enough magnetic fields.
Pulsars and neutron stars are hot because of all the residual heat left over in the core of the original star.
Pulsars --------------------------------------------Correction Pulsars are neutron stars that emit pulsating EM radiation at predictable frequencies. Obviously neutrons stars (something massive stars can collapse into when they die) are not the elementary particles of the universe. Therefore, 'quarks'.
pulsars
No, they are completely different. See related questions