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☆☆♥☆☆ ☆αℓℓ☆ ☆gσσ∂☆ ☆Thiηgs☆☆
Lv 6
☆☆♥☆☆ ☆αℓℓ☆ ☆gσσ∂☆ ☆Thiηgs☆☆ asked in Science & MathematicsAstronomy & Space · 7 years ago

Can you explain as to not how but why the C.B.R is detectable?

I shall attempt to explain.

If the universe was subject to inflation and light beyond our horizon has yet to reach us, then would not the very echoes of the B.B, i.e, the C.B.R also be outside our horizon?

We detect the C.B.R which is within our horizon so can you clear this up for me as I am a little confused on this?

Thanks in anticipation for helping

AGT

1 Answer

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  • neb
    Lv 7
    7 years ago

    I hate to go with the balloon analogy, but it might be helpful.

    Picture the universe as the 2-d surface of a balloon 300,000 years after the big bang (when CBR became 'visible') and imagine the surface of the balloon 'covered' with CBR at that point in time. Draw a small circle on the surface of the balloon. The region inside the circle is what will be our observable universe at our present time, the region outside the circle will not be observable at our present time. The CBR that is within the circle will stay visible as the balloon expands since we have defined that region as observable at our present time.

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