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- W1558092624 abstract "The spots do not remain stationary upon the body of the sun, but appear to move in relation to it with regular motions. Galileo Galilei in Letter to Mark Welser, 1613. These “Sunspot Letters” were one of the first written scientific discussions of sunspots . Discoveries and Opinions of Galileo translated with an Introduction and Notes by Stillman Drake, Anchor Books, 1957. Key concepts electromagnetic radiation heat transfer Standard Solar Model solar atmosphere solar cycle Introduction Since the dawn of man, the Sun has elicited worship, inspiration, and study, and tremendous mysteries about its dynamics still occupy the attention of solar astronomers and space physicists. This ignorance has profound implications. We now rely on space for global communication, navigation, and Earth observing, and solar dynamics cause degradation and failure of satellites and space instruments. Understanding solar dynamics is a key part of understanding space weather. This chapter describes what we know about the Sun and how we know it. Much of our knowledge comes from observations of the Sun, and much of it comes from applying the laws of physics (such as thermodynamics and nuclear and atomic physics) within quantitative models to make predictions of observable quantities. This is how we know what goes on inside the core of the Sun without going there or observing it directly. This combination of observation and physics as all owed us to know more about our natural surroundings than at any other time in human history." @default.
- W1558092624 created "2016-06-24" @default.
- W1558092624 creator A5008336061 @default.
- W1558092624 date "2008-02-07" @default.
- W1558092624 modified "2023-09-25" @default.
- W1558092624 title "The variable Sun" @default.
- W1558092624 doi "https://doi.org/10.1017/cbo9780511801365.003" @default.
- W1558092624 hasPublicationYear "2008" @default.
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