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Sunspots Simulation

Galileo's Sunspots JS Model

The Galileo's Sunspots JS Model illustrates the motion of sunspots across the face of the Sun as seen from a telescope on Earth. Many features of this motion were first noted by Galileo in the early 1600s. Users can use this simulation to recreate Galileo's observations, as well as determine the (synodic) period of the Sun's rotation and the obliquity of the Sun's equator.

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Galileo's Sunspots
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author image Todd Timberlake - Berry College