Redshift of Galaxies /w Brian Cox #space #astronomy #shorts

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Source: In Class With Brian Cox 2018 | The Royal Institution of Australia

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#science #astronomy #space

[vinzettoducama]

Except for Andromeda. It’s headed straight for us!

[thedirtytruth]

How do you get the refference wavelength for these equations? How do we know the wavelength of the light as it leaves the star if all we see is the wavelength when it reaches us?

[Jollyprez]

Halton Arp disproved Hubble's Law 50 years ago. The "really simple observation" may have been relevant in Hubble's time - 100 years ago, but modern telescopes that can detect radio, gamma, magnetic, and other emissions have negated his "law." Now, if only modern physicists will stop ignoring him, we can proceed.

[jonmurphy]

However the farther away a galaxy, the further back in time the light left . We should assume for the sake of modesty that in the time that had passed those galaxies are experiencing blue shifts as are the 100 galaxies in our neighborhood. 🎉

[dasmith]

Doppler shift of light at known fixed colors.

[Tobacc]

Space is contracting only giving the appearance that matter is expanding outwards.

[frederickwilt]

Being "redder" is just a fashion statement for those galaxies - just a fad.