1. The Death of the Sun Michael Liu Institute for Astronomy

3. Core of the Sun Temperature of ~15 million Kelvin Every second, 600 million tons of hydrogen are fused into 596 million tons of helium.

4. The Sun today The Sun in 5 billion years: 2000x more heat 100x larger

7. 5 billion years from today Today 6 billion years from today

13. The Sun is in gravitational equilibrium The outward push of pressure balances the inward pull of gravity. The energy provided by fusion in the core provides the outward pressure. The inward pull of gravity (the weight of the outer layers) causes the core to very hot and dense.

14. Stage #2: Red giant phase H-burning shell with inert He core Main sequence star (core H burning) Red giant star (H-shell burning)