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.
Holes, which include black holes and ozone holes were discovered in the space and atmosphere respectively.The black hole was discovered in the space and ozone holes were discovered above the Antarctica.
The term "Black hole" first appeared in print in an article by Ann Ewing in "Black Holes in Space" published in 1964.
black holes, and black nymph
A black hole is a region of space from which nothing, including light, can escape. It is called "black" because it absorbs light that hits it, reflecting nothing.
Karl Schwarzschild discovered black holes.
A black hole is an objects with such strong gravity that not even light can escape them. If observed up close a black hole would appear as a completely black sphere.
Interstellar space.
Time and Space
There are no plants in space.
black hole got it's name because when look at a black hole, you only see black. also if you drop an item in the black hole the item is gone because there is a hole in there. so that's how black hole get's its name
black holes. Yes it sounds like the question is about black holes. Stephen Hawkins has done a lot of work in this area, but he did not come up with the theory originally.
Steven Hawking is researching black holes right now.