Black holes are on a continuum of ultradense objects that form from the remnant cores of dead stars after they run out of fuel and collapse under gravity. White dwarfs form from stars up to about eight times the mass of the Sun, and have an upper mass limit of about 1.4 times the Sun's mass.

NASA blackhole audio waves were extracted radially or outwards from the supermassive black hole and were played in an anti-clockwise direction from the centre