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Results tagged with cosmology
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user 157517
The study of the large-scale structure, history, and future of the universe. Cosmology is about asking and answering questions about the "big picture" - the extent, origin, and fate of everything we know.
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Cosmic pancakes, filaments and halos
I read about the cosmic pancakes, filaments and halos and I think I don't have much intuition about them.
First, what they are exactly are? are these shapes in which the matter in the universe is ord …
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15
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Diffuse and background
What is the difference between diffuse emission and background? I understand that background supposed to be more general but I am not really understand what the difference between the two.
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answer
1k
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Perturbations in FRW metric
Considering the FRW metric with perturbations; how can I calculate the Einstein tensor (without a very very disgusting expression which comes from the variation of the difference between the Ricci ten …