Quantum, Relativity & Forces Explained | Pixelated Physics

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Pixel-art light wave stretching from blue to red as it travels from a spiral galaxy across expanding space, illustrating cosmological redshift

Is Cosmological Redshift a Doppler Shift? Stret...

Light from distant galaxies arrives stretched to longer, redder wavelengths. Is that a Doppler shift from galaxies racing away, or space itself stretching the light? Here is the formula that...

Is Cosmological Redshift a Doppler Shift? Stret...

Light from distant galaxies arrives stretched to longer, redder wavelengths. Is that a Doppler shift from galaxies racing away, or space itself stretching the light? Here is the formula that...