Redshift

How the “Einstein shift” was predicted 8 years before General Relativity

The idea of gravitational…

Why Measuring Redshifts Isn’t Enough To Understand The Universe

“Hubble’s Law” is only an…

Ask Ethan: What Causes Light To Redshift?

The light we observe isn’t the same as the light that gets…

Ask Ethan: How Can We See 46.1 Billion Light-Years Away In A 13.8 Billion Year Old Universe?

This Is How Astronomers Will Finally Measure The Universe’s Expansion Directly

And if the data is good…

Ask Ethan: Could ‘Cosmic Redshift’ Be Caused By Galactic Motion, Rather Than Expanding Space?

Ask Ethan: If Light Contracts And Expands With Space, How Do We Detect Gravitational Waves?

If The Universe Is 13.8 Billion Years Old, How Can We See 46 Billion Light Years Away?

Ask Ethan: How can we see so far away in such a young Universe?

46 billion light years in all…

The first stars in the Universe are forever invisible to human eyes