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Series 1

The Energy Story

Where solar energy comes from and what it is. No glass, no film — just the energy itself. The vocabulary every later series depends on.

1.1 It Starts 93 Million Miles Away → 1.2 Absorption: The Moment Heat Is Born → 1.3 The Atmosphere Filters First → 1.4 The Three Bands → 1.5 Visible Light Is Not Free Energy → 1.6 The Spectrum Isn't Flat → 1.7 ASTM G173: The Agreed-Upon Shape of Sunlight →