A black hole sun could be friendlier than you might expect ... 2.7 kelvin (about -270 ˚C), thanks to the cosmic microwave background (CMB), the heat left over from the explosion of the big ...

Black dwarfs are the very last stage of Sun-like stars. Currently in its main sequence hydrogen-burning phase, our Sun has about 4.5 billion years left before it enters the next stage of its life ...