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Redshift Articles

Tag Archive for: redshift

expandinguniverse

Explore Coordinate Dependent Statements in an Expanding Universe

January 6, 2018
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4 Comments
In this Insight, we will discuss the general Robertson-Walker (RW) universe, in which a set of co-moving observers with proper time ##t## observe the universe…
https://www.physicsforums.com/insights/wp-content/uploads/2018/01/expandinguniverse.png 135 240 Orodruin https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Orodruin2018-01-06 18:34:102024-08-17 16:22:14Explore Coordinate Dependent Statements in an Expanding Universe
universeexpansion

At What Velocity Does the Universe Expand and Can It Be Faster than Light?

February 9, 2016
Neither of these questions makes sense in the form in which it was posed. To see why, let's start by thinking about how we know the universe is expanding.The…
https://www.physicsforums.com/insights/wp-content/uploads/2016/02/universeexpansion.png 135 240 bcrowell https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png bcrowell2016-02-09 00:49:302024-08-17 07:12:03At What Velocity Does the Universe Expand and Can It Be Faster than Light?
quasarredshift

Evidence that Galaxy and Quasar Redshifts Are Cosmological

January 23, 2016
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0 Comments
How do we know that the redshifts of galaxies and quasars are cosmological and not "intrinsic"? Evidence for the cosmological interpretation Historical…
https://www.physicsforums.com/insights/wp-content/uploads/2016/01/quasarredshift.png 135 240 Multiple_Authors https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Multiple_Authors2016-01-23 16:21:152026-02-16 18:36:56Evidence that Galaxy and Quasar Redshifts Are Cosmological
redshiftblackholes

Time Dilation & Redshift of Schwarzschild Black Holes

September 30, 2015
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76 Comments
Time dilation near a Schwarzschild black hole The following is an overview of the time-dilation and gravitational-redshift effects of a static (Schwarzschild)…
https://www.physicsforums.com/insights/wp-content/uploads/2015/09/redshiftblackholes.png 135 240 stevebd1 https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png stevebd12015-09-30 14:10:172026-01-22 09:28:24Time Dilation & Redshift of Schwarzschild Black Holes

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