Transcript Presentation1

Made by Jordan
Intro
• As you think black holes are
cosmic vacuums they are actually
not!!
If a black hole swapped with the
sun non of our atmosphere would
change except it would be darker
and colder. Did you know in black
time is non existent and that black
and white hole are fact but worm
holes aren't.
• Black holes are evolutionary
endpoints of massive stars that
have died and crumbled inside
itself because of so much
gravitational pull which has
created a black hole.
• The mass inside a black hole is
said to be the energy that keeps it
going ,its mass comes from the
centre of the star it once was.
How big are black holes
Black holes are different sizes depending on
how they are formed, and their type. The sun
example the radius of 700,000 kilometers
so a super massive black hole has the
radius of four times the sun. A micro black
has the radius of up to 0.1
millimeters and a solar mass black hole has
the radius of 30 kilometers.
How do Black holes evaporate
• Black holes gradually evaporate
when the mass they have stored,
has no more energy left. The energy
is what keeps it going, so it will then
start to shrink, until it evaporates
into thin air.
• It is almost impossible to know
when a black hole is going to
evaporate, but sometimes
experimental tests will show you.
• There is no limit to how little or how
much a black hole can hold. As any
amount of mass can create a black
hole, even the tiniest amount, if you
minimise it to a high enough density.
• If one or two particles fall across the
horizon (Schwarzchild radius) and
escape it, it will carry an energy mass
with it.
Different kinds of Black holes
• A usual mass for a stellar black hole would
be about ten times the size of the sun
• A million solar mass black hole in the
centre of a galaxy, would have the radius
of three million kilometres.
• Opposite to black holes which suck in
masses are white holes which spit out
masses.
• The largest of black holes are thought to
be in other galaxies. These are bigger
than a solar mass black hole and have a
radius of a fraction of our solar system.
Facts
• If you were to be sucked into a black hole you
would have to cross inside the Schwarzchild
radius. You then get ripped into thousands of
pieces like noodles.
• At this radius the escape speed is equal to the
speed of light.
• The Schwarzchild radius is the black holes
horizon, like we have a horizon a black hole
has one too.
• Black holes have their name because they
absorb all light rebounding nothing.
The End
www.//en.wikipedia.org/wiki/black_hole
http://imagine.gsfc.nasa.gov/docs/science/know_12/black_holes.html
http://cosmology.berkeley.edu/Education/BHfaq.html
http://faraday.fc.up.pt/cfp/Members/paccetti/black_hole_milkyway.j
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Black Holes Photos, Black Holes Wallpapers, Download, Photos -- National Geographic