4 ms·
There's no hard threshold, the star just fades gradually from #FFF to #000. A fully black dwarf would be so cold it would be indistinguishable from cosmic back
by kijin 5y ago
There's no hard threshold, the star just fades gradually from #FFF to #000.
A fully black dwarf would be so cold it would be indistinguishable from cosmic background radiation, but that's going to take at least a trillion times longer than the current age of the universe. Not just slightly longer.
- kadoban 5y agoRight. I'm just saying that if the are any black dwarfs (which there should not be), we should be able to find ~arbitrarily dim ones as well, down to our ability to see.