Matter has to slip into the "event horizon" of the Black Hole (a sphere surrounding the Black Hole that is of a predictable width) before it will be inexorably drawn into the Black Hole. In our position in space (earth, sun, our whole solar system) we are nowhere near a Black Hole's event horizon. The nearest black holes to us are so far away that the pull we experience from their gravity is negligible.
Addendum:Actually, black holes are only one gravitational force that is constantly pulling on us. The problem, the reason you do not feel it, is that gravity is the weakest of the four fundamental forces (electromagnetism, strong interaction, weak interaction and gravitation).
Hypothetical celestial bodies that behave in an opposite manner to black holes and rather than pulling everything in they spit matter out. White holes also have a unstable gravity and collapse and turn into black holes.
Black holes are blavk because their gracity is so strong that light cannot escape for us to see.
Black holes are round due to the intense gravitational forces pulling matter towards the center. This gravity acts equally in all directions, resulting in a spherical shape. Any irregularities in shape would be quickly smoothed out by the immense gravitational forces at play.
Black holes gain mass by pulling matter into them. The mass of anything that falls into a black hole gets added to its mass. Even energy in the form of light and other electromagnetic radiation can add to a black hole's mass.
Since nothing, not even light, can escape black holes, they are invisible (so to speak). You can only see a black hole when it is sucking up light, since the object with light looks like something is pulling it away.Actually, there isn't much imagination in this. Black holes are named as such because they are, basically, holes in the universe which emit no light.
Black holes are some of the strangest and most mysterious objects in the universe. Suction is caused by pulling something into a vacuum, which the massive magnitude like the tornados on earth.
yes but not likely
stellar black holes were stars (these are large)primordial black holes were pieces of the big bang (these are microscopic)
Most Black Holes are created when a star that has 20 times the mass of our sun dies. In a stars life there is a constant war between pressure pushing out and gravity pulling in and when it dies it the outer part is thrown into space and the inner core collapses into itself, creating a black hole.
Black holes cannot be seen because they do not emit any light. Their strong gravitational pull prevents even light from escaping, making them invisible to us.
Well first of all white holes aren't proven to exist yet so nobody knows if they pose a threat at all. Unlike black holes, white holes repel everything and spit stuff back into space, so they wouldn't really pose a threat unless they spat out a large amount of mass right at the earth.
No. It certainly has black holes, but it has other things as well.No. It certainly has black holes, but it has other things as well.No. It certainly has black holes, but it has other things as well.No. It certainly has black holes, but it has other things as well.