The 2018 spring equinox has arrived — here’s what it is and how it works

economy

NASA/Flickr

  • The vernal or spring equinox of 2018 happens Tuesday, March 20.
  • Earth’s rotation does not cause equinoxes.
  • Equinoxes occur when Earth’s tilted axis is perpendicular to the sun’s rays.
  • During an equinox at Earth’s equator, the sun appears almost directly overhead.

The year’s spring equinox, also called the March or vernal equinox, falls on Tuesday at precisely 12:25 p.m. EDT.

To people who live in Earth’s northern hemisphere, this astronomical event signals the arrival of spring, winter’s end, and the increasingly warm and brighter days that come with the pending arrival of summer.

See the rest of the story at Business Insider

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See Also:

SEE ALSO: 17 ‘facts’ about space and Earth that you thought were true — but have been debunked by science

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