9/2/25

Cosmic Distance

The video introduces students to the Cosmic Distance Ladder, a step-by-step method astronomers use to measure distances in space. Through engaging classroom and outdoor activities, animations, and hands-on experiments, students explore key techniques; parallax for nearby stars, Cepheid variable stars for galaxies, Type Ia supernovae as standard candles, and redshift for the farthest galaxies. Using simple analogies, visual effects, and interactive demonstrations, the film shows how each “rung” builds on the previous one, helping us measure ever greater cosmic distances and understand the expanding universe.

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