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Earth's shadow - Wikipedia
EarthSky | How to see Earth’s shadow at sunrise and sunset
Umbra, penumbra and antumbra - Wikipedia
Uncovering Secrets of Earth's Shadow - Sky & Telescope
The Science Of Sunlight And Shadows - Science Friday
See Earth's shadow after sunset | Tonight | EarthSky
16.4: The Sun and the Earth-Moon System - Geosciences LibreTexts
Earth's 'shadow bands' - Astronomy Magazine
Earth's Shadow Creeps Up on Us Every Night - Sky & Telescope
An Almost Total Lunar Eclipse - NASA Science