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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.
4
votes
Angular Power Spectrum of CMB
As a first step, it would be good to review what this multipole moment $l$ means. The CMB is of course coming at us from a spherical shell around us. We therefore see a spherical projection, and we wo …
1
vote
Did light already experience death of the universe immediately after the Big Bang?
This is a typical conundrum created in using classical thinking in combination with some relativistic concepts (e.g. photons experience no time)
Infinite time dilation (i.e. no time elapsed for the p …