The seasons change on Earth today, and Google is getting into the equinox spirit with a pair of doodles to celebrate the yearly milestone.
Today, March 20, marks the the vernal equinox (opens in new tab), when the sun passes over Earth's equator (from our perspective on the planet) and the Northern Hemisphere is tilted toward the sun. That leads to longer days (and the start of spring!) in the north and shorter days (and autumn) in the south.
To celebrate the seasonal change, Google created two doodles: one celebrating the first at of spring for the Northern Hemisphere, and other for the first day of fall in the Southern Hemisphere.
Today also marks the full moon of March, called the full Worm Moon.
Tonight's full moon (opens in new tab) occurs at 9:43 p.m. EDT (0143 March 21 GMT) and will be the third and final "supermoon" of 2019, according to NASA. The space agency describes supermoons as a full moon that occurs near perigee, the closest point to Earth in the moon's monthly orbit.
So, celebrate the first day of spring (or fall, if you're in the Southern Hemisphere) with a look at the "Super Worm Equinox Moon" tonight!
Editor's note: If you capture an amazing photo or video of the Super Worm Equinox Moon and would like to share it with Space.com for a story or gallery, send images and comments to email@example.com.
- March Full Moon 2019: Spring Equinox Brings the 'Super Worm Moon'! (opens in new tab)
- The Four Seasons: Change Marks the Passing of a Year (opens in new tab)
- Google Doodle Celebrates Year's Shortest Day (opens in new tab)