most urban populations have lost or are losing Dark Skies and the Milky Way
"Losing the Dark" – The International Dark-Sky Association and Loch Ness Productions
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2021 moon phases northern hemisphere
2021 moon phases
North Hemis.
4:56
2021 moon phases southern hemisphere
2021 moon phases
South Hemis.
4:57
Losing the Dark feature on worldwide light pollution
Earth's light spoiling the night
6:25
To scale The Solar System
our solar system built to scale

7:07
The Milky Way as ancient saw it - introduction by Archeo Doxa in 2015
Milky Way as ancients saw it

en Français, English CC 4:13




star field by Starry Night Backyard, formerly Imaginova   now Simulation Curriculum