Page 31 - Curriculum Visions Dynamic Book

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300
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50 0
1980 1981
1982 1983
1984 1985
Year
1986 1987 1988
For more on Skylab see Volume 7: Shuttle to Space Station.
 During the Skylab space station missions the variations in energy received on Earth from the Sun were recorded. They showed a cyclic pattern.
1955
1960
1965
1970
1975
1980
1985
1990
1995
2000
Number of sunspots
Energy from the Sun received on Earth. Watts per square meter
Year
 This is how the number of sunspots has changed in recent years. The peaks and troughs show an approximately 11-year cycle. The next minimum will be about 2006.
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