vernal equinox occurs on
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Answer:
event equinox solstice equinox solstice
month March June September December
year
day time day time day time day time
2015 20 22:45 21 16:38 23 08:20 22 04:48
2016 20 04:31 20 22:35 22 14:21 21 10:45
2017 20 10:29 21 04:25 22 20:02 21 16:29
2018 20 16:15 21 10:07 23 01:54 21 22:22
2019 20 21:58 21 15:54 23 07:50 22 04:19
2020 20 03:50 20 21:43 22 13:31 21 10:03
2021 20 09:37 21 03:32 22 19:21 21 15:59
2022 20 15:33 21 09:14 23 01:04 21 21:48
2023 20 21:25 21 14:58 23 06:50 22 03:28
2024 20 03:07 20 20:51 22 12:44 21 09:20
2025 20 09:02 21 02:42 22 18:20 21 15:03
An equinox is commonly regarded as the instant of time when the plane (extended indefinitely in all directions) of Earth's equator passes through the geometric center of the Sun's disk.[3][4] This occurs twice each year, around 20 March and 23 September. In other words, it is the moment at which the center of the visible Sun is directly above the equator.
The Sun at the moment of the March equinox in 2019, when the center of the solar disk contacts the celestial equator (the imaginary line on the celestial sphere above Earth's equator) from south to north.
The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitive noctis) (night). On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet. They are not exactly equal, however, due to the angular size of the Sun, atmospheric refraction, and the rapidly changing duration of the length of day that occurs at most latitudes around the equinoxes. Long before conceiving this equality, primitive equatorial cultures noted the day when the Sun rises due east and sets due west, and indeed this happens on the day closest to the astronomically defined event.
In the Northern Hemisphere, the March equinox is called the vernal or spring equinox while the September equinox is called the autumnal or fall equinox. In the Southern Hemisphere, the reverse is true. The dates slightly vary due to leap years and other factors.[5]
Since the Moon (and to a lesser extent the planets) causes Earth's orbit to slightly vary from a perfect ellipse, the equinox is officially defined by the Sun's more regular ecliptic longitude rather than by its declination. The instants of the equinoxes are currently defined to be when the apparent geocentric longitude of the Sun is 0° and 180°.[6]
Answer:
Spring Equinox 2021 in Northern Hemisphere will be at 3:07 pm on
Saturday, 20 March
All times are in India Standard Time.
The equinoxes and solstices are caused by Earth's tilt on its axis and ceaseless motion in orbit. ... The celestial equator wraps the sky directly above Earth's equator. At the equinox, the sun crosses the celestial equator, to enter the sky's Northern Hemisphere
Explanation:
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