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Black holes

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  • 1. BLACK HOLESTitle
  • 2. 1915: Einstein’s Theory of Gravity predicted the possibility ofblack holes, but no one believed they actually existed!1967: Term “Black Hole” coined1970’s: Convincing evidence that black holes are realToday: NASA space telescopes have discovered evidenceforblack holes throughout the universeAlbert Einstein
  • 3. What did Einstein say about Gravity?Mass distorts space - “curving” itObjects and light moving near the massive object areforced to take a curved path around the object.Just like the Moon orbiting Earth.
  • 4. What is a Black Hole?An unimaginably denseregion of space wherespace is curved around itso completely and gravitybecomes so strong thatnothing, not even light, canescape.Mass is so great in such a small volume that thevelocity needed to escape is greater than thespeed light travels.
  • 5. How much would you “weigh”?On Earth, let’s say you weigh 150 lbs.On the Moon, you’d weigh 25 lbs.On Jupiter, you’d weigh 350 lbs.On the Sun, you’d weigh 4,000 lbs.Near a Black Hole,you’d weigh over20 TRILLON POUNDS !!!
  • 6. There are 200 billion stars in our galaxy, the Milky WayThere are also millions of black holesIncluding one giant black hole at the very center.
  • 7. Where do black holes come from?Three classifications of black holes:Stellar-mass: 3 to 20 times the mass of our SunSupermassive: Black holes with millions to billions of times themass of our SunMid-mass: In between stellar-mass and supermassive
  • 8. Stellar-mass:Black holes are made when a giant star,many times the mass of our Sun, dies.Most of the star’s atmosphere is blowninto space as a supernova explosion.The star’s spent core collapses underits own weight.If the remaining mass is more than themass of 3 Suns, it will collapse into ablack hole.Where do black holes come from?
  • 9. Supermassive:Extremely massive blackholes have been found inthe centers of manygalaxies - including ourown!Where do black holes comefrom?
  • 10. Mid-Mass:Scientists are finding these inthe centers of large, densestar clusters.Like this globular star cluster,called M15, in our Galaxy.Where do black holes comefrom?
  • 11. Produced by-Mihail DavidevskiKristijan DomazetovskiSasho Meglenovski

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