how can we really say that space is expanding when we cannot see the distant galaxies forming nor are the planets nearby newly formed, nor is anything expanding in size nor are we going far away? (sorry if it's unclear)
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2Have you read the answers to this question? The gist is that we see the vast majority of distant galaxies moving directly away from us implying that either the Earth is at the centre of the universe or space is expanding uniformly. What additional questions to you have? – or1426 May 19 '15 at 09:35
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Technically, we don't. We do have a lot of astronomical evidence, though. – WhatRoughBeast May 19 '15 at 12:55
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@or1426 sorry for asking a duplicate question :( – curious May 24 '15 at 13:39
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Red shift. is a really quick answer. whichever way we look, stuff is moving away from us. and the further away it is the faster it's moving.
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