Abstract: The life of the stars is determined by the physical processes happening deep inside these hot gaseous balls of fire. In this Helen Sawyer Hogg public lecture, Conny Aerts will explain how asteroseismologists decode tiny stellar vibrations to peer beyond the visible external layers of stars, allowing them to see the invisible. While enjoying some stellar symphonies, the audience will learn how extraterrestrial seismic waves operating inside stars offer a unique probe of the physical conditions and chemical composition in their deep interior.  We will follow the footsteps of asteroseismologists to measure the sizes, masses, and ages of stars, facilitating archaeological studies of the Milky Way and the hunt for extraterrestrial life.  Gearing up as the talk moves along, the audience will also learn about internal stellar rotation.  We end with an outlook on the detection of magnetic fields buried deep inside stars, tidal asteroseismology, and new projects on the horizon for this vibrant research field of astrophysics.

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Come early to see An Invariable Star: The Work & Life of Helen Sawyer Hogg, a historical exhibit on Canadian astronomer Helen Sawyer Hogg featuring artifacts and images from the University of Toronto’s historical collections. 6-7pm, Isabel Bader Theatre Lobby.