did you guys ever see that movie event horizon.. i always thought it was just a semi clever movie name.. but an Event Horizon is actually a scientific term.. it is the horizon on a black hole where no light can get passed.. and it is determined by the strength of the black hole... so imagine it as light is trying to escape the black hole.. and at a certain point.. it just can't go any further because of the incredible force.. and gets sucked back in...

but supposedly black holes actually can be seen due to the radiation they emit... not seen by the eye.. but there presence can be detected... in fact they believe that there is one not to far away in our galaxy