Earth  ID: 11141

The Four Seasons

It's no secret that the 23.5 degree tilt of Earth's axis causes the amount of sunlight that reaches the planet's surface to change throughout the year, producing the familiar pattern of spring, summer, fall and winter. A sharp variation in seasons can be seen particularly in places around or within the mid-latitudes, where the amount of sunlight received ranges widely depending on the time of year. Located at about 39 degrees north of the equator, Lake Tahoe, a nature lover's playground on the California-Nevada border, gets a hearty taste of all four seasons. Viewed from space, the seasons paint the landscape in passing shades of green, brown and white. Watch the transformation in the time-lapse video of images captured by NASA's Earth Observing-1 satellite between August 2009 and September 2010.

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NASA Earth Observatory

Story Credits

Robert Simmon (Sigma Space Corporation)

Adam P. Voiland (Sigma Space Corporation)

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