Tag: Astronomy
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Equinox
Today marks the vernal equinox, often described (in the Northern Hemisphere) as the first day of spring. The word equinox refers to “equal night”: for a lot of Earth, today marks roughly 12 hours of day and 12 hours of night. In the Northern Hemisphere, we’ll start seeing increasingly more than 12 hours of daylight…
Galileo's Pendulum 