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  2. Equinox - Wikipedia

    en.wikipedia.org/wiki/Equinox

    Vernal equinox and autumnal equinox: these classical names are direct derivatives of Latin (ver = spring, and autumnus = autumn). These are the historically universal and still most widely used terms for the equinoxes, but are potentially confusing because in the southern hemisphere the vernal equinox does not occur in spring and the autumnal ...

  3. Um, What Exactly Is the Spring Equinox and What Happens ... - AOL

    www.aol.com/um-exactly-spring-equinox-happens...

    The spring equinox is considered the start of spring in the Northern Hemisphere. Also known as the March equinox or vernal equinox, what it means exactly is that the sun crosses over the line of ...

  4. March equinox - Wikipedia

    en.wikipedia.org/wiki/March_equinox

    The March equinox is known as the vernal equinox (or spring equinox) in the Northern Hemisphere and as the autumnal equinox (or fall equinox) in the Southern Hemisphere. [8] [7] [10] On the Gregorian calendar at 0° longitude, the northward equinox can occur as early as 19 March (which happened most recently in 1796, and will happen next in ...

  5. Earth-centered inertial - Wikipedia

    en.wikipedia.org/wiki/Earth-centered_inertial

    J2000: One commonly used ECI frame is defined with the Earth's Mean Equator and Mean Equinox (MEME) at 12:00 Terrestrial Time on 1 January 2000. It can be referred to as J2K, J2000 or EME2000. The x-axis is aligned with the mean vernal equinox.

  6. The science behind the vernal equinox [Video] - AOL

    www.aol.com/news/science-behind-vernal-equinox...

    The beginning of spring is known as the vernal equinox. Let's find out how it happens. Seasons change all the time. The changing of the seasons is either a solstice or an equinox. The beginning of ...

  7. Meteorologists Say Spring Starts Before The Equinox, And It’s ...

    www.aol.com/meteorologists-spring-starts-equinox...

    It’s the result of a different loose definition of seasons that meteorologists often use. ... In 2025, the vernal equinox will occur on Thursday, March 20, at 5:01 a.m. ET.

  8. First point of Aries - Wikipedia

    en.wikipedia.org/wiki/First_point_of_Aries

    The first point of Aries, also known as the cusp of Aries, is the location of the March equinox (the vernal equinox in the northern hemisphere, and the autumnal equinox in the southern), used as a reference point in celestial coordinate systems. In diagrams using such coordinate systems, it is often indicated with the symbol ♈︎.

  9. Vernal Equinox Day - Wikipedia

    en.wikipedia.org/wiki/Vernal_Equinox_Day

    Vernal Equinox Day became a public holiday in 1948. Prior to that it was the date of Shunki kōreisai (春季皇霊祭), an event relating to Shinto. Like other Japanese holidays, this holiday was repackaged as a non-religious holiday for the sake of separation of religion and state in Japan's postwar constitution. Pre-1945 State Shinto or ...