Vesto Slipher: Uncovering the Cosmos – The Indiana History Blog
Redshift and Distance in the Expanding Universe | ScienceBlogs
Astronomical Redshift | Imaging the Universe - The University of Iowa
EarthSky | What do redshifts tell astronomers?
Have astronomers ever observed a violet shift like they have blue shifts and red shifts? | Science Questions with Surprising Answers
RASC Calgary Centre - Cosmological Redshift
Redshift; Used Purchase | Page 14 | Aloft Forums
How do astronomers know the universe is expanding? - Curious
redshift | Definition & Facts | Britannica
Frontier Fields Q&A: Redshift and Looking Back in Time | Frontier Fields
Redshift and Distance in the Expanding Universe | ScienceBlogs
How does the red shift of distant galaxies indicate that the universe is expanding? | Socratic
Doppler Redshift
Redshift
cosmology - Other explanation for cosmological redshift? - Physics Stack Exchange
Voyages | Redshift
The Universe is expanding. This cartoon on redshift explains how we know. - Science Over Everything
schoolphysics ::Welcome::
Doppler Shift
How Do we know about redshift? - Astronomy Stack Exchange
Red shift (video) | Scale of the universe | Khan Academy
