How do Newton’s laws of gravity relate to black holes? Black holes obey all laws of physics, including the laws of gravity. Their remarkable properties are in fact a direct consequence of gravity. In 1687, Isaac Newton showed that all objects...
Who discovered Cygnus X-1? The video describes how the advent of x-ray astronomy opened up a new world for astronomers to explore. Paul Murdin and colleagues discovered that Cygnus X-1 was likely a black hole by searching for signs of binary...
What were X-rays first used for? In 1897, X-rays were first used on a military battlefield, during the Balkan War, to find bullets and broken bones inside patients. Scientists were quick to realize the benefits of X-rays, but slower to comprehend...
What are dark stars called? Astronomy. Dark star (Newtonian mechanics), a star that has a gravitational pull strong enough to trap light under Newtonian gravity. Dark star (dark matter), a star heated by annihilation of dark matter particles within it. Dark-energy...
Is a dark star the same as a black hole? Whether light is affected by gravity under Newtonian mechanics is unclear but if it were accelerated the same way as projectiles, any light emitted at the surface of a dark star...
What is the equation for black holes? 2. Black Holes and Bekenstein’s Insight. R S ( M ) = 2 G M c 2 , where G is the gravitational constant and c is the speed of light. What is Stephen...
What is Stephen Hawking’s black hole theory? In 1976, Hawking suggested that, as black holes evaporate, they destroy information about what had formed them. That idea goes against a fundamental law of quantum mechanics which states any process in physics can...
What was Stephen Hawking’s black hole theory? In 1976, Hawking suggested that, as black holes evaporate, they destroy information about what had formed them. That idea goes against a fundamental law of quantum mechanics which states any process in physics can...
What is inside a black hole Stephen Hawking? Black holes are the remains of stars that have collapsed under their own gravity, producing gravitational forces so strong that even light can’t escape. Anything that falls inside is thought to be ripped...
Does every black hole contain a singularity? All black holes contain singularities, however not all singularities involve black holes. A neutron star may be dense, matter the size of a pinhead can weigh as much as the earth, but there seems...