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Black Holes

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Black Holes Sara and Jordan What are Black Holes? Remnants of former stars Star begins to collapse on itself Shrinks to zero volume (infinitely dense) Place where ... – PowerPoint PPT presentation

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Title: Black Holes


1
Black Holes
  • Sara and Jordan

2
What are Black Holes?
  • Remnants of former stars
  • Star begins to collapse on itself

3
  • Shrinks to zero volume (infinitely dense)
  • Place where ordinary gravity has become so
    extreme that it overwhelms all other forces in
    the universe

4
Inside a Black Hole
  • Tidal Forces
  • Stretch a person the closer to the center you
    get
  • You can see out no one can see in
  • No light escapes a Black Hole

5
Outside Looking In
  • Looks like time has stood still
  • Reasons
  • Pass the Horizon
  • Radiation a person emits hovers at horizon
  • keeps image for an infinitely long time

6
More about them
  • Has Event Horizons
  • Boundary of Black Hole
  • A person can pass through
  • Once crossed, there is no coming back
  • To escape, a person needs to move faster than
    light

7
  • Space time is distorted
  • Coordinates describing radial distance and time
    switch role
  • Invented by John Archibald Wheeler

8
Theories
  • Age
  • Move just outside Horizon then leave
  • People have aged but you have not

9
Universe within Black Holes
  • Wormholes
  • Enter in through a black hole, come out a white
    hole
  • Doesnt collapse into a single point
  • Tunnel between universes

10
  • In a Black Hole
  • A universe within a black hole
  • The Black Hole is in another Black Hole

11
Why theyre black
  • So dense that no matter - including light- can
    escape

12
Works Cited
  • http//cosmology.berkeley.edu/Education/BHfaq.html
  • http//hubblesite.org/explore_astronomy/black_hole
    s/home.html
  • http//news.nationalgeographic.com/news/2010/04/10
    0409-black-holes-alternate-universe-multiverse-ein
    stein-wormholes/
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