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Earth's Seasons - Windows to the Universe
The landscape and weather change greatly during the year in regions that have four distinct seasons.
Click on image for full size
Images Courtesy of Corel

The Four Seasons

It takes the Earth one year to travel around the sun one time. During this year, there are four seasons: summer, autumn, winter, and spring. Each season depends on the amount of sunlight reaching the surface and the Earth's tilt as it revolves around the sun.

When it is summer in the northern hemisphere, it is winter in the southern hemisphere. At the equator, there are no seasons because the sun is always striking there.


Last modified June 26, 2008 by Vanessa Pearce.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA