What Is Redshift? How Astronomers Measure the Expanding Universe!

Redshift is when light arriving from distant objects stretches toward the red end of the spectrum—signaling they’re moving away!

🚀 In this video, you’ll discover:
• The three types of redshift: Doppler, gravitational, and cosmological
• Everyday analogy with sirens & light waves
• How cosmological redshift reveals the Universe’s expansion—and Hubble’s law (“farther = faster”)
• Measuring redshift via spectrometry & using it to gauge cosmic distances and time travel!

🔭 Scientists even use redshift to spot exoplanets by observing a star’s “wobble” in light

If you’re fascinated by space, light, and the expanding cosmos—this video’s for you!

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