Nolan Shayer

2. physical size of black holes is measured with a special unit
4. first approach to locating black holes
9. a black hole is compared to this
11. attraction of that body.
13. dividing line beyond which anything that crosses cannot escape
14. the center of a black hole an infinitely dense remnant of a massive star’s core collapse.
15. people who study black holes and space.
16. deals largely with the effects of gravity, and in essence predicts the
18. space, possibly triggered by the birth of black holes.
19. a black hole is faster then this.
20. anything that crosses cannot escape
21. the galaxy everything we know is apart of

1. this cant be seen directly
3. several millions of times the mass of our own Sun.
5. dividing line beyond
6. required for one object to be launched from the surface of a body in order for it to escape the
7. of black holes and singularities.
8. Whats the color of a black hole?
10. Einstien called blackholes these.
12. not really a hole full of dark matter and has no gravity
17. material falling into the black hole collects into a band of hot gas and dust