Black Holes
The anomalous black holes are concentrated areas of mass so immense, that the mammoth force of gravity denies anything within a certain area around it from passing. This area is called the event horizon of a black hole. They have given black holes their name because light inside the event horizon can never be seen by mankind, or any outside observer.
Information on black holes is limited, though numerous schools of theory exist. They know black holes exist not because they can see them, but because of the impact they have on the space around them. Scientists like Karl Schwarzschild, Jayant Narlikar and Stephen Hawking have built upon ideas from Einstein and others to offer theories on black holes. And yet, they remain an enigma. Because extensive, proven black holes information is scarce, they remain a constant area of intrigue and curiosity.
For more information, please visit http://www.space.com