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Read the Light of the UniverseModule 4How Cosmic Light Becomes Astronomical Data
Module 4 / Lesson 15 of 2426 min
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Which Light Reaches the Ground?

How does Earth's atmosphere protect life while also hiding much of the electromagnetic sky?

Map transparent, partial, and blocked wavelength regions to ground, airborne, and space observatories.

A high mountain observatory sits below Earth's glowing atmosphere while a space telescope observes above it.
Vastward artistic reconstruction. It compares observing locations, not the exact scale or orbit of a particular mission.

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