29 lines
1.1 KiB
Plaintext
29 lines
1.1 KiB
Plaintext
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.NH 1
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Light from the beginning of time
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.PP
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.METAINFO1
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This chapter introduces a more reliable way to determine the geometry of the universe, thanks to the cosmic microwave background radiations.
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.METAINFO2
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Trying to measure the universe weight by gravitational lensing galaxies and clusters is fundamentally flawed.
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This could only provide a rough approximation in case the weight actually came from somewhere within clusters.
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In case the weight of the universe comes from between clusters, then our method doesn't work.
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Another involves observing cosmic microwave background radiations (CRBR) and actually measure see the curvature of the universe.
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.SH
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Measuring the geometry of the universe
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.PP
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Before trying to explain how to measure the curvature of the universe, let's try to answer a simpler question.
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.QUESTION "How to measure the curvature of a world in two dimensions?"
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.TBD
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.SH
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Cosmic Microwave Background Radiations
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.PP
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Somewhere around 300 000 years after the Big Bang, the universe became cold enough to emit radiations.
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.TBD
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.EXPLANATION1
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Gravity is propagated at the speed of light.
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.EXPLANATION2
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