Which statement is more accurate? (Hubble's redshift vs. Hubble's law)

[louislaolu]

TL;DR Summary

Hubble's redshift vs. Hubble's law

A. The two great cosmological discoveries of this century, Hubble's redshift and the cosmic microwave background, have made the Big Bang theory the most credible theory of the origin of the universe so far.
B. The two great cosmological discoveries of this century, Hubble's law and the cosmic microwave background, have made the Big Bang theory the most credible theory of the origin of the universe so far.
Which of the above two statement is more accurate?

 

[BvU]

Is this homework ?

perhaps flip a coin ?

$\$

 

[louislaolu]

Is this homework ?

perhaps flip a coin ?

$\$

Actually I am trying to figure out why Hubble's redshift was replaced with Hubble's law when the sentence containing the former was translated from Chinese into English.

 

[BvU]

I see. Most likely there is no specific reason. Who knows, except perhaps the translator.

$\$

 

[Bandersnatch]

Hubble's redshift is not a standard term in the field. Is probably why.

 

[PeroK]

Actually I am trying to figure out why Hubble's redshift was replaced with Hubble's law when the sentence containing the former was translated from Chinese into English.

Hubble's law is the standard phrase in English.

 

[Madeleine Birchfield]

I prefer "Hubble–Lemaître law" to "Hubble's law" since Georges Lemaître discovered and published the law 2 years prior to Edwin Hubble.

 

[HEA48]

TL;DR Summary: Hubble's redshift vs. Hubble's law

A. The two great cosmological discoveries of this century, Hubble's redshift and the cosmic microwave background, have made the Big Bang theory the most credible theory of the origin of the universe so far.
B. The two great cosmological discoveries of this century, Hubble's law and the cosmic microwave background, have made the Big Bang theory the most credible theory of the origin of the universe so far.
Which of the above two statement is more accurate?

B is more accurate because Hubble's law is used to define universal expansion (the measure of which is the Hubble constant "H sub zero"), and universal expansion is based, in large part, on observed redshifts of distant galaxies.

 

[Jaime Rudas]

It must be borne in mind that the big bang theory is not a theory of the origin of the universe, but of its evolution. On the other hand, the "Hubble's redshift" is actually the Slipher's redshift.

 

[Bandersnatch]

Shush! Or Doppler will hear you.

 

[Jaime Rudas]

Shush! Or Doppler will hear you.

I don't think so: Doppler shift is produced by the speed of displacement of the emitter with respect to the receiver, while the cosmological shift is produced by the expansion of space.

 

[Bandersnatch]

I don't think so: Doppler shift is produced by the speed of displacement of the emitter with respect to the receiver, while the cosmological shift is produced by the expansion of space.

If you look carefully enough, you'll find them to be the same thing. Take a look at this article: https://www.physicsforums.com/insig...e/#Doppler-Shift-Versus-Cosmological-Redshift

 

[berkeman]

If you look carefully enough, you'll find them to be the same thing. Take a look at this article: https://www.physicsforums.com/insig...e/#Doppler-Shift-Versus-Cosmological-Redshift

I dunno, should we trust a full professor at university who does research and publishes textbooks?

 

[PeterDonis]

Actually I am trying to figure out why Hubble's redshift was replaced with Hubble's law when the sentence containing the former was translated from Chinese into English.

That's not a question about cosmology, or even about physics in general. It's a question about how the translator was programmed.

Thread closed.