Across
- 2. this force causes everything to fall to the ground
- 5. the concept of four dimensional space with time
- 6. the minimum speed needed to escape gravity
- 8. neutron star that has strong magnetic field
- 9. give such a steady pulse that they seem artificial
- 13. the theory of gravity made by Einstein
- 15. the theory that black holes radiate thermal energy
- 16. an area with infinite density and mass
- 18. a huge explosion that occurs when a star dies
- 19. blue stars the size of cities
- 20. the brightness of an object
Down
- 1. not even light can escape
- 3. he came up with hawking radiation
- 4. at this point there is no turning back
- 7. the explosion caused when a star dies and becomes a neutron star or black hole
- 10. the field of magnetism around objects
- 11. two stars revolving around each other
- 12. a type of electromagnetic radiation thathas the highest energy
- 14. very densely packed matter in a neutron star, named after food
- 17. the process of objects stretching out