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Science

longship

(40,416 posts)

6. Light isn't sound; space isn't air

Reply to tridim (Reply #5)

Sat Mar 31, 2012, 08:16 PM

Mar 2012

The Doppler shift of starlight comes from the expanding universe. That's how the Big Bang was discovered. If the expansion is increasing, the extent to which it increases will effect the Doppler Shift of the light, but that happens much slower than we can detect within the timeframe we've been observing it.

There is no media, like air, in the universe. That's what Einstein demonstrated in 1905 in his papers on electrodynamics (aka relativity).

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Mysteries of "The Redshift Desert" --Why Do Galaxies in the Early Universe Appear Old? [View all] n2doc Mar 2012 OP

Although shunned by the herd, there are still viable alternatives to the Big Bang theory. Speck Tater Mar 2012 #1

??? There either was a beginning of time or there wasn't. You can't have both. DetlefK Mar 2012 #3

Steady State hypothesized the continuous creation of new hydrogen Speck Tater Mar 2012 #7

Explain the CMB. laconicsax Mar 2012 #9

Yup. That's why steady state in its current form has been discredited. Speck Tater Apr 2012 #10

Idle speculation isn't how progress is made. laconicsax Apr 2012 #11

Two things. Speck Tater Apr 2012 #12

All of the advances by those you quote built on the work of others. laconicsax Apr 2012 #13

What was that famous quote? Speck Tater Apr 2012 #14

And yet, Copernicus didn't idly speculate. laconicsax Apr 2012 #15

Ah, so your real quibble is with the word "idle". Speck Tater Apr 2012 #16

I'm I the only one who believes redshift can be affected by compressed and/or expanded space? tridim Mar 2012 #2

Compressing space won't help DetlefK Mar 2012 #4

Who said the Universe is flat on a cosological scale? tridim Mar 2012 #5

Light isn't sound; space isn't air longship Mar 2012 #6

The WMAP experiment did. laconicsax Mar 2012 #8