Black Hole the Interesting story of our Universe

What is a Black hole ?
A black hole is a region of space in which the gravitational field is so powerful that nothing, not even electromagnetic radiation (e.g. visible light), can escape its pull after having fallen past its event horizon. The term derives from the fact that the absorption of visible light renders the hole's interior invisible, and indistinguishable from the black space around it.
Despite its interior being invisible, a black hole may reveal its presence through an interaction with matter that lies in orbit outside its event horizon. For example, a black hole may be perceived by tracking the movement of a group of stars that orbit its center. Alternatively, one may observe gas (from a nearby star, for instance) that has been drawn into the black hole. The gas spirals inward, heating up to very high temperatures and emitting large amounts of radiation that can be detected from earthbound and earth-orbiting telescopes. Such observations have resulted in the general scientific consensus that—barring a breakdown in our understanding of nature—black holes do exist in our universe.[…]

Some interesting findings about Black Hole:

• Seeing The Shape Of Material Around Black Holes For First Time: After culling the literature for observed black holes, astronomers looked at 245 active galactic nuclei to characterize the shape of material swirling around them. The result: active galactic nuclei look like donuts, funneling from a dark center. This observation should constrain theories about how the material around black holes is produced and eventually allow scientists to study black holes themselves.[1]
• No Matter Their Size Black Holes 'Feed' In The Same Way: Research by UK astronomers reveals that the processes at work in black holes of all sizes are the same and that supermassive black holes are simply scaled up versions of small Galactic black holes. For many years astronomers have been trying to understand the similarities between stellar-mass sized Galactic black hole systems and the supermassive black holes in active galactic nuclei (AGN).[2]
• Chandra Sees Remarkable Eclipse Of Black Hole: A remarkable eclipse of a supermassive black hole and the hot gas disk around it has been observed with NASA's Chandra X-ray Observatory. This eclipse has allowed two key predictions about the effects of supermassive black holes to be tested.[3]
• Black Holes On The Loose: Two merging black holes can generate gravitational waves so powerful that the merged hole shoots out of its host galaxy at a speed of up to 2,500 miles per second, according to a new simulation.[4]
• Scientists Find Black Hole 'Missing Link': Scientists have found the "missing link" between small and super-massive black holes. For the first time the researchers have discovered that a strong X-ray pulse is emitting from a giant black hole in a galaxy 500 million light years from Earth. The pulse has been created by gas being sucked by gravity on to the black hole at the center of the galaxy.[5]