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        Why Do We Have Seasons?

        Explore what causes seasons on Earth in this interactive produced by WGBH and adapted from NASA materials. The interactive features four cities at different latitudes (New York City, Miami, Singapore, and Melbourne) and provides information about their seasonal conditions at eight points in Earth's orbit. Illustrations show how the Sun's path through the sky and the angle of sunlight hitting Earth's surface vary depending on latitude of a location and Earth's position in its orbit. Text boxes describe the shape of Earth's orbit, how the duration and angle of sunlight influence the energy received at Earth's surface, and seasonal lag. 

        This interactive replaces “Earth in Motion: Seasons,” which was removed because of inaccurate content. This resource is part of the NASA Planetary Sciences Collection

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