Skip to main content

Week 7: Variable stars

Completion requirements

Annotated Hertzsprung-Russell diagram showing the paths of stars as they leave the Main Sequence at the end of their lifetimes. A red arrow from the position of the Sun leads up to the Red Giant area at top right, labelled to indicate processes of Expansion, Helium burning and Shell burning. From the Red Giant area, a blue arrow leads first to the left, with labels indicating the Instability strip and Variable stars above the central part of the Main Sequence. The blue arrow then crosses the Main Sequence at top left and heads downwards and rightwards to the White Dwarf region. This part of the track is labelled as Fuel exhausted and Gravitational collapse.