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How the Universe Works Black Holes Name _______________ 1. When stars ten times bigger than the sun explode a (nova) (supernova) (hypernova) occurs. 2. Black holes form from stars that are (10) (100) (1000) times as big as the sun. 3. When these stars explode a (nova) (supernova) (hypernova) occurs. 4. (Ultraviolet) (Infrared) (Gamma) ray bursts are signs that a black hole has formed. 5. There are (dozens) (hundreds) (billions) of black holes in the universe. 6. The edge of a black hole is called the (accretion disk) (event horizon) (singularity). 7. As you approach a black hole you would experience (taffication) (spaghettification) (plastication). 8. If a space probe were to look out of a black hole it would see (blackness) (light being sucked in) (nothing). 9. If a space probe were to look into of a black hole it would see the center of the black hole called the (accretion disk) (event horizon) (singularity). 10. Most black holes are about (the size of our solar system) (20 miles across) (the size of a pin head). 11. The stars at the center of the Milky Way move extremely (slow) (fast). 12. At the center of the Milky Way is a (miniature black hole) (supermassive black hole) (blue supergiant star). 13. (Pulsars) (Quasars) (White Holes) are the brightest thing in the universe. 14. Quasars (suck gas in) (blow gas out). 15. The Chandra Space Telescope detects (Gamma Rays) (X-Rays) (Ultraviolet Rays) produced by quasars. 16. To view the supermassive black hole at the center of the Milky Way astronomers use an array of telescopes to detect (visible light) (X-Ray) (radio waves) emitted from it.