Across
- 3. a burst of gamma rays from space, possibly triggered by the birth of black holes.
- 6. the outside part of a black hole where the escape velocity is more than the speed of light.
- 10. where stars, planets,blackholes, and more.
- 11. the velocity needed to escape the gravitational pull from the surface of the body of mass.
- 16. a flattened disk of matter orbiting around an object. friction causes spirals.
- 18. the center of a black hole, an infinitely dense remnant of a massive star’s core collapse.
- 19. the theory of how the universe was created.
- 20. the attraction force between two bodies of mass.
- 21. the galaxy that we live in
Down
- 1. the slowing of the flow of time, which may be observed for objects that approach the event horizon of a black hole.
- 2. the middle of a star begins to fuse and its size fluctuates until an outward force balances it.
- 4. the speed at which light travels, 300,000 kilometers per second (186,000 miles per second).
- 5. what most stars in our galaxy are, they are the average temp and size.
- 7. the end stage of a star when it collapses on itself becomes so dense light cant escape.
- 8. the most powerful form of electromagnetic radiation, with the shortest wavelengths.
- 9. the distance light travels in one year, approximately 9.46 trillion meters (5.88 trillion miles).
- 12. the radius of an object with a given mass at which the escape velocity equals the speed of light.It is the radius corresponding to the event horizon of a black hole
- 13. when high mass stars create supernovas then condense down to tiny stars called
- 14. theoretical “tubes” in space-time, which could be entered from a black hole, and were predicted based on the simplest solution of Einstein’s equations.
- 15. accumulation of small objects to form a larger object because of their attraction of gravity.
- 17. an explosion caused by the collapse of the core of a massive star.
