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Where did our universe come from? | Ethan Siegel: Full Interview

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Understanding Cosmic Light: Blue Shift and Red Shift Explained

This chapter explores light and sound waves in relation to galaxies, discussing blue and red shifts in light wavelengths due to cosmic movement. It highlights key historical contributions from astronomers like Hubble and Slipher, as well as Lemaitre's pivotal insights on the expanding universe.

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