is the gravitational equivalent of the star or stars that created it, which is oftentimes the gravitational equivalent of the combined masses of hundreds or even millions of other stars. Some black holes could be the size of a basketball, yet contain as much gravitation from the mass it gobbled as we have in the entire solar system. That's rather compact, to say the least. If it sound too outrageous to be true, it's because you haven't studied these phenomena. They are proven to be very real indeed. How they got that way is what you'd need to learn about. The star being eaten then becomes a part of the black hole itself, adding yet more mass to it. Which makes it even easier to draw in more mass, more stars. I've known most of my life that sounds can't be transmitted in space. I wasn't expecting to hear the real sound, especially of something THAT far away. But space is NOT "full of vacuum." It is full of...NOTHING AT ALL! Except that it is not total vacuum, since there are molecules that are found throughout the cosmos, even in the areas that seem to be emptiest. Still it's effectively NOTHING for purposes other than scientific ones, where they may need to know of such minuscule quantities of matter in space. If a cube of space, 100 miles squared, has 50 molecules in it, it's still a vacuum, for the most part. To get a true sound, you need an