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This year, the vernal equinox occurs on March 19, 2020. The last time it occurred this early was in 1896.
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NOAA’s GOES East (GOES-19) satellite viewed the autumnal equinox, which marked the official start of astronomical fall, on…
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There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in…
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Spring has officially sprung here in the Northern Hemisphere—while in the Southern Hemisphere, autumn has begun!
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It is that time of year again (it happens twice) when the relative angle of Earth is perpendicular to the Sun, causing equal…
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In 2019, the official start of fall—the Autumnal Equinox—was Monday, Sept. 23 at 3:50 a.m. EDT.
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There are two times each year, in March and September, when the amount of daylight and darkness is “nearly” equal at all…
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It’s officially autumn in the Northern Hemisphere—the season when days get shorter as that half of the world heads toward…