Without our Sun, there would be no heat, no light and no life on Earth. An eleven-year cycle of magnetic activity modulates its appearance, and the occurrence of eruptive events such as flares and coronal mass ejections. I shall discuss how these, in turn, affect the Earth - and how the Sun currently does not seem to be behaving as expected.

The transcript and downloadable versions of the lecture are available from the Gresham College Website: http://www.gresham.ac.uk/lectures-and-events/the-sun-our-nearest-star

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