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A mathematical description of a black hole.
Considers an observer hovering just outside the event horizon of a black hole, and the acceleration of gravity experienced. Also looks at an object falling through the event horizon.
Read about the areas CERN is researching from dark matter to supersymmetry to black holes.
A question and answer forum on new science, covering pulsars, black holes, the big bang and more.
Images and text relating to the discovery of a massive black hole at the centre of the M87 Galaxy. Images from the Hubble Space Telescope are visible
A long lisit of cosmology questions, dealing with subjects such as the Big Bang, dark matter, black holes, the expanding universe.
A star exists in a delicate balance between the crushing force of gravity, on the one hand, and the push of incredibly hot gases on the other.
A great site about Einstein's ideas with lots of information on special and general relativity, cosmology, gravitational waves, black holes.
Create your own star and watch its life play out. Can you create a black hole?
This article reviews the recent work that has proved Einstein's relativistic theory of "Frame-dragging", using observations from X-ray astronomy satellites.
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