Star
No group at all. They are all different
AstronomersStarsThe big bang theoryRed giant starOpticial astronomyNebulaeO' ConnellMilky WayYellow dwarf
A giant star would experience a supernova explosion, in order to become a white dwarf.
Red giant - Black dwarf. See related questions.
a dog
Pulsar
No group at all. They are all different
; Binary Stars, Black Dwarf,Black Hole,Brown Dwarf,Galaxy,Main-Sequence Stars,Nebula,Neutron Star,Nova,Pulsar,Quasar,Red Giant,Supergiant,Supernova,Variable Star,White Dwarf,Wolf-Rayet Star...................
AstronomersStarsThe big bang theoryRed giant starOpticial astronomyNebulaeO' ConnellMilky WayYellow dwarf
No a pulsar cannot be an unstable red giant. It is nothing more than a neutron star [See related question]
No. Sirius is a two-star system consisting of a white main sequence star and a white dwarf.
A pulsar can't even be seen by a giant telescope, you can only perceive the pulses they send with a radio.
In order from least to greatest in mean radius:Vesta (protoplanet)Pallas (protoplanet)Charon+ (dwarf planet)Orcus (dwarf planet)Quaoar (dwarf planet)Ceres (dwarf planet)Sedna (dwarf planet)"Snow White" [2007 OR10]* (dwarf planet)Haumea* (dwarf planet)Makemake (dwarf planet)Pluto+ (dwarf planet)Eris (dwarf planet)Mercury (terrestrial planet)Mars (terrestrial planet)Venus (terrestrial planet)Earth (terrestrial planet)Neptune (ice giant)Uranus (ice giant)Saturn (gas giant)Jupiter (gas giant)*There is a slight discrepancy as to how Haumea ought to be measured, due to its unusual shape. This makes it slightly unclear as to which is considered larger between Haumea and "Snow White."+Binary planet
The dwarf star is.
The white dwarf will cool down till it becomes a black dwarf. If it's part of a close binary with a main sequence, giant or supergiant, the white dwarf can gain mass from the other star. This can start fusion of carbon in the white dwarf. Other fusion reactions quickly follow, causing it to explode. This is known as type 1a supernova.
Main-sequence,red giant,white dwarf.
White Dwarf, Sun, Red Giant, Supernova