dusk to night
A sky’s view perspective of the transition from dusk to night, seen on two evenings.
Different clouds at different altitudes, may move around in different directions… at the same time.
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the dark topic of light pollution
(instagram) How much light do we get exposed to after dark, and how does it matter? People all over the world are living under the nighttime glow of artificial light, and it is causing big problems for humans, wildlife, and the environment. ~ National Geographic This illuminating 😉 post on the Harvard site seems to…
