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Science 8 December 1978:
Vol. 202. no. 4372, pp. 1079 - 1081
DOI: 10.1126/science.202.4372.1079
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Articles

Solar Rotation Determined from Thomas Harriot's Sunspot Observations of 1611 to 1613

RICHARD B. HERR 1

1 Department of Physics and Astronomy, University of Delaware, Newark 19711

In 1612 the sun's mean sidereal rotation rate was only 13.3° per day based on a series of 199 unpublished drawings by Harriot. By comparison with the rates in 1625 to 1626 and 1642 to 1644 it appears that the solar rotation was accelerating significantly in the cycles leading up to the Maunder minimum.

Submitted on April 5, 1978
Revised on June 27, 1978


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Changes in Atmospheric Carbon-14 Attributed to a Variable Sun.
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