Satellite imagery provides bird’s eye view of Earth at the change of seasons.
Pretty neat imagery and explanation from NASA:
Enjoy the Equinox!
Every year, there are two equinoxes. One is in March; the other is in September. In 2014, the March equinox falls on March 20, 2014. On the equinoxes, the sun shines directly on the equator and the length of day and night is nearly equal. Seasons are opposite on either side of the equator, so the March equinox is called the spring (or vernal) equinox in the northern hemisphere. But in the southern hemisphere, it’s known as the fall (autumnal) equinox. What do equinoxes look like from space? The Spinning Enhanced Visible and Infrared Imager (SEVIRI) on EUMETSAT’s Meteosat-9 captured these four views of Earth from geosynchronous orbit. The images show how sunlight fell on the Earth on December 21, 2010 (upper left), and March 20 (upper right), June 21 (lower left), and September 20, 2011 (lower right). Each image was taken at 6:12 a.m. local time. Notice how on March 20 and September 20, the terminator — the divide between day and night — is a straight north-south line, and the Sun is said to sit directly above the equator. Equinox means “equal night” in Latin, capturing the idea that daytime and nighttime are equal lengths everywhere on the planet.
Read more about the equinoxes and solstices at
http://
See a video of the equinoxes and solstices from space at
http://www.youtube.com/
Read more about the March Equinox from Date and Time at
http://
