Sandra Perkins

5. these huge black holes form at the cores of galaxies, where they grow larger and larger, feeding on the gas and dust at the center
6. explodes at the end of its life in a blaze of glory
8. is the attractive force between any two bodies that is the result of their masses
10. the most powerful form of electromagnetic radiation, with the shortest wavelengths
11. the gravity is so strong that anything passing close to it is affected by its strong gravitational attraction.
12. collapsing forms black holes
16. is the gradual accumulation of small objects to form a larger object due to their mutual gravitational attraction
18. its known our own Milky Way galaxy has a supermassive black hole
20. the estimated amount of stellar mass black holes

1. outside the event horizon, material falling into the black hole collects into a band of hot gas and dust
2. is two stars orbiting each other, moving in generally predictable ways because of the gravitational attraction between the stars.
3. is the German astronomer who theorized black holes forms when a massive star collapses
4. forms when a star at least eight times the mass of our Sun
7. is the dividing line beyond which anything that crosses cannot escape
9. the physical size of black holes is measured with a special unit
13. lies in the very middle of a black hole
14. is a direct result of distorting space
15. year the distance light travels in one year, approximately 9.46 trillion meters
17. these kinds of black holes can have a mass a billion times that of our sun and much bigger
19. is a structured grouping of billions of stars, gas, and dust, bound together by their collective gravity and orbiting a common center