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Ask Ethan: How Much Of The Observable Universe Are We Failing To See?

9 Dec 2017, 15:01 UTC
Ask Ethan: How Much Of The Observable Universe Are We Failing To See?
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The distant Universe, as viewed here through the plane of the Milky Way, consists of stars and galaxies, as well as opaque gas and dust, going back as far as we can see. But we know we aren’t seeing it all, no matter how we look. Image credit: 2 Micron All Sky Survey (2MASS).There’s so much that we’ve discovered, looking as deeply as possible into the void. But what are we missing?Start with the laws of physics, a Universe full of a specific amount matter and radiation, and a hot, dense, expanding, and mostly uniform state, and wait. 13.8 billion years later, you’ll have a Universe that looks an awful lot like our own. It’s full of stars, galaxies, clusters, filaments, and trillions upon trillions of chances for rocky planets, liquid water, and life. But how far does the accessible Universe go on for, and how much of it has yet to be revealed? That’s what our Patreon supporterFrederick Martello wants to know:The Hubble Deep Field saw approx. 13+ Billion Light Years in one direction, so can we can assume we would see 13+ Billion in all directions? The deep field picture showed infant galaxies that are misshapen and just ...

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