Tag Archive for: redshift
Explore Coordinate Dependent Statements in an Expanding Universe
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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…
At What Velocity Does the Universe Expand and Can It Be Faster than Light?
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…
Could Redshifts Be Intrinsic Rather than Cosmological?
How do we know that the redshifts of galaxies and quasars are cosmological and not "intrinsic?"
Evidence for the cosmological interpretation
The purpose…
Learn Time Dilation and Redshift for a Static Black Hole
The following is an overview of the time dilation and gravitational redshift effects of a static (Schwarzschild) black hole. By general relativity, a strong…