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A 1945 Life article reported on "an egg-balancing craze" among the population of Chongqing (the interim capital of China during World War II) on that year's Lichun. [5] That article and subsequent followings-up started a similar egg-balancing craze in the United States, but transposed to the vernal equinox beginning Western spring on March 20 or 21 when the sun is at the celestial longitude of ...
On the date of the equinox, the center of the Sun spends a roughly equal amount of time above and below the horizon at every location on the Earth, so night and day [d] are about the same length. Sunrise and sunset can be defined in several ways, but a widespread definition is the time that the top limb of the Sun is level with the horizon. [28]
In astronomy, an equinox is either of two places on the celestial sphere at which the ecliptic intersects the celestial equator. [1] [2] [3] Although there are two such intersections, the equinox associated with the Sun's ascending node is used as the conventional origin of celestial coordinate systems and referred to simply as "the equinox".
The Earth's orbit is also elliptical, meaning it can be closer or farther to the sun, depending on where the planet is in its 365.24 day cycle. This shapes when the astronomical seasons fall. This ...
The Met Office explains the difference between meteorological spring and astronomical spring
The equinox arrives on Saturday, marking the start of the fall season for the Northern Hemisphere. Here's what to know about how we split up the year using the Earth's orbit. As the Earth travels ...
Mean equinox of date is the intersection of the ecliptic of "date" (that is, the ecliptic in its position at "date") with the mean equator (that is, the equator rotated by precession to its position at "date", but free from the small periodic oscillations of nutation). Commonly used in planetary orbit calculation. True equinox of date
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