Black holes are very cold. In effect the new formula counts the holes of a black hole and the spacetime that surrounds it (yes, even black holes have holes in them). Taking a black hole’s temperature is a seemingly impossible task. Naively you'd expect that a black hole would be at absolute zero. The Hawking temperature (Hawking, 1974) is the black body temperature at which a black hole emits radiation due to quantum effects close to the event horizon. « Reply #13 on: 10/04/2012 16:25:49 » I think some Idea of temperature could be obtained by applying the consevation of energy rule assuming the the originol star that collapsed had a mass of 10^32 Kg a density of 1 and and average tempurature of 10,000 °K when compressed to QGP density the temperature would go up in proprtion. Re: What is the temperature inside a Black Hole? The internal temperature of a black hole with the mass of our Sun is around one-millionth of a degree above absolute zero. The more massive it is, the lower its temperature, although it’s still not zero. Temperature is in degrees Kelvin. In 2015, researchers discovered a black hole named CID-947 that grew much more quickly than its host galaxy.