Daily Archives October 4, 2016

Star Talk: Variable Stars – Action in the Sky

October 4, 2016
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var_stars “Variable Stars: Action in the Sky”, presented by John Percy, Professor Emeritus of the Department of Astronomy & Astrophysics, and Dunlap Institute

Abstract: Stars aren’t changeless and boring. They may eclipse, pulsate (vibrate), flare, erupt, or even explode. These processes cause the stars to vary in brightness over time and, by studying these variations, we can learn about the nature, evolution, birth and death of the stars, and about the physical processes that occur within them. Variable stars help us to understand some of the most exciting and bizarre objects in the sky: exoplanets, supernovas, pulsars, quasars, gamma-ray bursts, and even black holes. I will also explain some of the ways in which Canadian astronomers, and skilled amateur astronomers, and my undergraduate research students are contributing to this research.

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