All stars vary in brightness. On geological time scales, main sequence
stars become bright red giants and end their lives as dim white dwarfs,
neutron stars, or black holes. As stars evolve, some pulsate regularly on
time scales ranging from seconds to years. Other stars vary irregularly.
SSP scientists study these variations to learn about the structure and
life history of stars.
Canada's MOST mission
FU Orionis variables
NASA's Kepler mission
Sallie L. Baliunas,
Andrea K. Dupree,