RE: Are the Galxies Expanding?
April 8, 2019 at 6:42 pm
(This post was last modified: April 8, 2019 at 6:44 pm by bennyboy.)
(April 8, 2019 at 5:32 pm)Jackalope Wrote:(April 8, 2019 at 5:19 pm)bennyboy Wrote: Red shifting is just the doppler effect-- if a star is moving away, its spectrographic spikes shift toward red. It doesn't necessarily imply a general expansion, unless a collection of bodies are ALL red-shifted-- which they mostly are. Pretty much everything we observe seems to be red-shifted.
Except objects in our local galaxy. Those are moving away or towards depending on their relative motion due to gravity. Other galaxies not gravitationally interacting with our galaxy, sure.
"Unless a collection of bodies are all red-shifted."
