Space mysteries

I just realized that I always post about earth mysteries, and there is always things related to real stories, mysteries we have on this planet, but...

I always was very interested about space, planets, galaxies, black matter.... And I think that there are a lot of people who like it too, and so from now on, I will add a point in my list and we will explore science mysteries together.

First, and I think one of the most popular things to talk about is, the Black Hole.

What is a Black Hole? How it works?

Is a region in space that exhibit a high gravitation level, that even planets, galaxies, stars and even the light, can't escape from it.

In fact, a Black Hole it's doesn't visible as a thing, such a planet, or star, to explain it, the Black Hole is a part of nothing, a black region, in the space, that is noticeble by a rare activity of the planets, their movement is faster that the usual, because of the high level of gravity, Black Hole just call them like a vacuum cleaner, that makes them move faster by the axis. Just throw a big ball to the bed, and then put around small balls, you will see that the big one attracts the small balls by the gravity.