The fate, shape and composition of the Universe

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Lecture 29
The fate, shape and composition of the Universe
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There is more mass than you can see!!!
Abell 2218, direction of Draco (Hubble)
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Vacuum energy
L
(also known as dark energy or cosmological
constant)
1917
vacuum
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Matter curves space-time
1915
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Cosmological questions
Cosmological parameters
What is the geometry (shape) of the Universe?
Model of the Universe
How much stuff there is in the Universe?
What is the Universe made of?
What is the fate of the Universe?
Expand forever big freeze
Recollapse eventually big crunch
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Fate
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Distant supernovae
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History
You are here
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SDSS
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z0.3 age11 billion years
z0
14 billion years
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How?
Tools statistics.
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?
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Figure from a scientific journal
Science for real
Vacuum Energy density
Supernovae
Dark energy
CMB
Galaxy survey
Universe is FLAT
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A preposterous universe
Coincidence problem

120 orders of magnitude
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end
Chapter 28 sec. 4, 5, 6, 7, 8, 9
Read p. 665 S. Hawkings contribution and p.688
J. Rhul contribution