Question: are white dwarfs hotter than the sun?
Answer: As you may know, a white dwarf is the cinder of a star which used to be like the Sun. ... When a star has just become a white dwarf, it is hotter than 100,000 K (about 180,000 F). It then gradually cools --- after many billions of years, it can become cooler than the Sun (which is about 6,000 K).