Mainly because you can't SEE THEM !
If they exist, they can only be detected by their gravitational effects on other nearby objects, or by the
radiation from matter falling into them. In either case, their properties, as well as their very existence,
can only be inferred indirectly, and can never be directly observed. If they exist.
Only a small percentage of stars become black holes eventually - the most massive stars.
Because they dont give off light
no dude, the evidences of the existence of black holes is now widely accepted and i believe that black holes rules our universe but it is difficult to find them because black holes are nearly the perfectly black bodies
they don't give of light but can be spotted by observing its gravity's affects.
Black holes are a bit hard to detect, so I am pretty sure that not all black holes in this galaxy are known - and I suspect there is not even a decent estimate. But you can expect there to be several.
Black holes do not die but they can evaporate.
Black holes are round because they are formed from dead stars and white holes. As you can guess a star is a sphere and that is why black holes are round.
you go to a hole that's black and tell people about it.
While black holes give off radio waves, the fact that no light can escape, or be reflected off of, black holes makes them completely invisible to any regular light-capturing device.
Black holes emit Hawking Radiation, which is the only way of locating one from a great distance
no dude, the evidences of the existence of black holes is now widely accepted and i believe that black holes rules our universe but it is difficult to find them because black holes are nearly the perfectly black bodies
they don't give of light but can be spotted by observing its gravity's affects.
Black holes emit so very little radiation they are hard to see. Many black holes lie at the center of galaxies and there they are hidden by stars and dust.
Black holes are a bit hard to detect, so I am pretty sure that not all black holes in this galaxy are known - and I suspect there is not even a decent estimate. But you can expect there to be several.
It was to dark to to see
The nearest know black hole is at a distance of several thousand light-years. There are probably black holes closer by, but they are hard to detect, if they don't happen to be part of a close binary star system.The nearest know black hole is at a distance of several thousand light-years. There are probably black holes closer by, but they are hard to detect, if they don't happen to be part of a close binary star system.The nearest know black hole is at a distance of several thousand light-years. There are probably black holes closer by, but they are hard to detect, if they don't happen to be part of a close binary star system.The nearest know black hole is at a distance of several thousand light-years. There are probably black holes closer by, but they are hard to detect, if they don't happen to be part of a close binary star system.
Yes and no. It is rather hard to explain, because black holes are so dark and black that no living creature can see them, which in a sense makes them invisible, but you can also see where a black hole is because it sucks in light, too, so that would also, in a sense make it visible, but the my main answer would be, no black holes are not invisible.
Because they give off absolutely no light and no radiation. The only radiation is X-Rays from the stars being sucked in.
stellar black holes were stars (these are large)primordial black holes were pieces of the big bang (these are microscopic)