Interesting facts about black holes

Black holes seem to many a sort of funnel in outer space, sucking in itself not only matter, but even sunlight. It would be very frightening, so it's good, probably, that this popular opinion does not correspond to the truth.

1 All the stars of our galaxy revolve around the supermassive black hole located in its center.

2 The gravity of a black hole is so strong that it attracts even light.

3 If the Earth turned into a black hole, it would be the size of a small nut.

4 Black holes evaporate over time.

5 Nothing, not even light, can leave the neighborhood of a black hole after passing through the horizon of events.

6 As time approaches the event horizon, time slows down.

7 The extreme mass of black holes distorts the space around them.

8 A black hole can become at the end of its life path a star with a mass of about ten solar ones.

9 Rotating black holes appear as a result of the fusion of two ordinary holes.

10 One of the black holes located 35 thousand light-years away revolves around its axis at a speed of a little less than a thousand revolutions per second.

11 Supermassive black holes can have a mass of ten to thirty million solar.

12 A black hole weighing four million solar may well fit in the space between the Sun and the orbit of Mercury

13 During the passage of the black hole event horizon, the substance accelerates to the speed of light.

14 Black holes generate sounds that astronomers have managed to hear.

The largest known black hole is located in the center of the galaxy NGG 1277, 228 million light-years away from the Earth.

16 Because a black hole absorbs light, it can not be seen.

17 The nearest black hole from us is about twenty thousand light-years away.

18 Black holes do not pose a danger to objects that do not approach them too close.

19 There are double stellar systems in which one of the stars is a black hole.