The Big Bang

The Big Bang
Ian Cintron and Rebecca Sekban
What is the big bang?
• It is a cosmology theory of the universe.
• The big bang theory is a theory based on
observation and scientific evidence.
• A common misconception is that the Big Bang
theory does not explain how the universe was
created but rather how it was once such a
small piece of space.
Big Bang
• The big bang was a large explosion.
• It was a explosion of space, and it exploded
within itself.
• Temperatures and density were really high.
Big Bang
• Within the first few days of the universe, it
was in equilibrium.
• The universe cooled to a temperature where
photons can not be created or destroyed.
Big Bang
• The theory began in 1912 American
astronomer Vesto Slipher while observing a
spiral galaxy, found a nebula moving away
from Earth.
Big Bang
• In 1924, Edwin Hubble
measured the distance of
the nebula. He discovered
that they were actually
out of the Milky Way.
Meaning that there was
more then one galaxy.
• This meant that one point
in time the universe was
contained in on single
point in space.
Big Bang
• In 1931, Lemaitre, extrapolated the matter of
the universe would reach an infinite density
and temperature at a finite time in the past.
• This means the universe must have begun in
an incredibly small, dense point of matter - a
"primeval atom."
Big Bang
• Fred Hoyle is responsible for the name “Big
Bang” but he used it dismissively.
Cosmic Microwave Background
• CMB is left over radiation from the Big Bang.
• This radiation fills the universe in the dark space.
• It is the most important distinction between The Big
Bang and other creation theories.
Common Questions about the Big
• What existed before the Big Bang?
• What caused the Big Bang?
• Is our universe the only one?
• Big Bang
Works Cited
"The Big Bang." NASA Science. Web. 19 Apr. 2011.
"THE BIG BANG." University of Michigan. Web. 19 Apr.
2011. <>.
"Big Bang." Wikipedia, the Free Encyclopedia. Web. 19
Apr. 2011. <>.
"HowStuffWorks "How the Big Bang Theory Works""
Howstuffworks "Science" Web. 19 Apr. 2011.

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