Do black holes really exist?

[greenman]

When we asked our sience teacher - she said - it's unclear. Is it true?
Thanks.

[alfa]

When we asked our sience teacher - she said - it's unclear. Is it true?
Thanks.

"Black hole, white hole". Nobody could actually explain to me what is that in a simple way. I don't know.

[moonster]

Nobody know for sure.
Astronomers have discovered quite a few objects that can only be explained as black holes. These objects are dark, so we cannot see them, but they exert a powerful influence on the stars, gas, and even space around them. These objects are so dark, dense, and heavy that they must be either black holes or something even more exotic.
There is a lot of discussion on this topic on Internet. Here just few links:
http://www.nasa.gov/audience/forstudent ... Exist.html
http://cfa-www.harvard.edu/seuforum/bh_reallyexist.htm
http://www.eurekalert.org/features/doe/ ... 050505.php
Have fun!

[greenman]

Nobody know for sure.
Astronomers have discovered quite a few objects that can only be explained as black holes. These objects are dark, so we cannot see them, but they exert a powerful influence on the stars, gas, and even space around them. These objects are so dark, dense, and heavy that they must be either black holes or something even more exotic.
There is a lot of discussion on this topic on Internet. Here just few links:
http://www.nasa.gov/audience/forstudent ... Exist.html
http://cfa-www.harvard.edu/seuforum/bh_reallyexist.htm
http://www.eurekalert.org/features/doe/ ... 050505.php
Have fun!

Thanks!!!
WAW!!! So it's not a fiction! I still can?t imagine it but? How come that a large amount of matter may be concentrated in a zero volume? Small, ok ? but zero?!!! It?s not been proved yet right? So it may be that we just don?t understand something?
Thanks a lot any case.
G.

[Brandon]

of course.