In our galaxy, there are millions of stars. In our universe, there are millions of galaxies. Humans have known about stars since the beginning of our existence. What we think of these mysterious things have changed over time. Even in periods as short as a lifetime our ideas have changed. I remember when I was young I thought of stars similar to the way astronomers thought many years ago, that the Earth was the center …showed first 75 words of 712 total…

…showed last 75 words of 712 total…wears itself out into nothing. Black holes are still very mysterious things. Nobody can go into a black hole or even get near it to do studies, and it is unlikely anyone will anytime soon. Right now everything we know about black holes could be wrong. Maybe one day we will be able to send satellites into black holes, but for now we will only be able to make more theories about these powerful mysteries.