Question

How can white dwarfs be both hot and dim?

Answer 1

❣️$\huge\underline\mathfrak{heya}$❣️

A white dwarf is relatively hot, but it's also very small (about the size of the Earth). For example, the nearby white dwarf Sirius B has a temperature a little more than 4 times that of the Sun's temperature, but its radius is about 0.008 times that of the Sun's.

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