Doppler Effect Proven by Red Light from Distant Galaxies

  • Thread starter Thread starter Kglocc
  • Start date Start date
  • Tags Tags
    Inflation
AI Thread Summary
The discussion centers on the claim that red light from distant galaxies indicates they are moving away, supporting the Doppler effect. A counterpoint is raised, suggesting that redshift can also result from light diffraction through space dust or gravitational influences. Participants express varying levels of familiarity with the topic, with some humorously acknowledging a lack of current knowledge. The mention of "Tired Light" theory suggests an alternative explanation for redshift. Overall, the conversation highlights the complexities of interpreting redshift in astrophysics.
Kglocc
Messages
43
Reaction score
0
claim: the red light observed from distant galaxies proves they are moving away. (doppler effect right?)
null: because light becomes red diffracting through a medium like space dust or even by gravitation.
sorry if I'm off base or 50years behind, just a general "yes/no" or "get out of my forum you pea-brained biologist" will do .

Roger that. I'm bustin out on this funk.
 
Last edited:
Space news on Phys.org
Make that 80 years, not 50. :smile:

Tired Light (Wikipedia)
 

Thread 'Matter density right after the decoupling'

https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
View full post »

Thread 'Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".'

The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
View full post »

Thread 'Big Bang and Infinite Universe'

Hi, I’m pretty new to cosmology and I’m trying to get my head around the Big Bang and the potential infinite extent of the universe as a whole. There’s lots of misleading info out there but this forum and a few others have helped me and I just wanted to check I have the right idea. The Big Bang was the creation of space and time. At this instant t=0 space was infinite in size but the scale factor was zero. I’m picturing it (hopefully correctly) like an excel spreadsheet with infinite...
View full post »

Similar threads

Expansion is a compounded error based on a wrong assumption?
Replies
3
Views
2K
I Some redshift from prism effect of a gravitational lens?
Replies
18
Views
3K
I Does red shift approach infinite near time zero?
Replies
14
Views
2K
B Why doesn't cosmic inflation violate conservation of energy?
Replies
3
Views
3K
B Is there more to the Red Shift than we think?
Replies
18
Views
4K
What causes the red-shift observed in distant galaxies?
Replies
7
Views
3K
How Do We Determine the Original Color of Light from Distant Galaxies?
Replies
15
Views
3K
I New possible explanation for Hubble redshift
Replies
15
Views
3K
Doppler effect and expanding universe
Replies
9
Views
6K
How and how much does is the cosmological red shift affected?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top