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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.

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Suppose at $ t=0$ universe came into existence and at time $t$ the parts of the universe reached a distance $d=vt$. Now we have the Hubble's Law which states that the expansion of our universe is line …
answered Jan 6 '17 by user141242