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More than 2 trillion galaxies in the universe, at least 10 times as many as we thought

In the 1990s, Hubble surprised astronomers by revealing just how packed the universe is with galaxies: they estimated some 200 billion of them based on its observations. But now we know these estimates were wrong. There are at least 2 trillion. Conselice and his team reached this conclusion using deep-space images from Hubble and the already published data from other teams.
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