noun
black dwarf
Astronomical term for a theoretical stellar remnant: a white dwarf that has cooled sufficiently to no longer emit significant heat or light. The universe is not old enough for any to exist yet.
黒色矮星は、白色矮星が冷え切った後の姿だと考えられている。
A black dwarf is thought to be the state of a white dwarf after it has completely cooled down.
Given the age of the universe, it is believed that no black dwarfs exist yet.