How do black hole affect people?

Answer 1

Depends on the distance from the black hole. Ignoring the fact that one would asphyxiate without a space suit, as long as one is beyond the event horizon, one would simply orbit the black hole (assuming one had an orbit to begin with). Once one reached the event horizon, however, there would be no return. A stellar mass black hole would actually stretch one's body until it is torn apart as it is pulled into the black hole. In short, don't go beyond the event horizon. It would result in one's very interesting and exotic death. Still, bad idea.

P.S. Sorry about all the ones, I just like sounding like Captain Picard.

Answer 2

From a scientific standpoint black holes constitute elegant proof of tenets of General Relativity, stellar evolution, quantum physics and other subjects, while at the same time presenting tantalizing mysteries yet to be explained by modern physics - and thus encouraging ongoing research about the universe. Black holes are sometimes cast as sinister entities but in reality provide the gravitational underpinnings of many galaxies - the hub around which we rotate and in a greater sense the larger structure of matter in the universe on scales where gravity is a more plainly manifest force. Black holes are also believed to power objects among the brightest and most distant known to humanity - quasars - which give a feel for the boundaries of the observable universe.