Questions tagged [cosmic-microwave-background]

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3answers
211 views

Why do scientists assume they can measure the shape of the universe if it is also widely believed to be infinite?

The shape of the universe is the question of whether the universe is flat, has a positive curvature or a negative one. More recently astronomers have compared radiation coming from extremely distant ...
2
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3answers
241 views

Is the universe older than 13.7 Billion years?

I came to know that the cosmic horizon is the part of universe beyond which we cannot see. So if the light from 13.7 billion years ago is what we can observe, does that mean the universe is older than ...
4
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3answers
154 views

cosmic-microwave-background - 2.7 degrees but does the Big Bang care?

The Big Bang is a proposed answer to the beginning of the universe, and the Cosmic Microwave Background or CMB is a central part of the evidence for it. Now suppose the measurement returned a ...
7
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3answers
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Can we track matter through time by looking at different depths in space?

If we look back far enough we can see all the origins of the universe, so is it possible, even if not feasible, that we could trace the history of some matter as it moves through space-time? I want to ...
1
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1answer
63 views

Deep space radiation distribution

What frequency distribution law applies to a random point in deep space that is assumed to be far away from any particular source of radiation. Can it be expressed by some form of Plancks/Bose-...
2
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1answer
119 views

Scientific evidence against CMB originating from “Oort Soup”?

In this article (and references therein) the author claims that the Cosmic Background Radiation can be explained as black-body radiation originating from the cold bodies filling the interstellar space ...
0
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2answers
63 views

How much radiation would something need to output to sufficiently affect the CMB? [closed]

Let’s say that I had some device capable of outputting insane amounts of radiation, across the entire EM spectrum. If I wanted to affect the CMB to the point that, were Earth-based scientists to know ...
1
vote
1answer
79 views

How thick is the cosmic microwave background, including the part we cannot see within the observable universe?

What I want to know is how thick the observable universe is from the point of the cosmic microwave background and beyond. It appears the thickness of the cosmic microwave background itself (the part ...