What Are Variable Stars and How Many Different Types Of Variable Stars Are There That Change In Brightness?

Three types of variable stars grow brighter and dimmer at regular intervals: Cepheids, RR Lyrae, and long-period variables (LPVs).

These stars are probably between old age and death.

Cepheids take anywhere from about 1 to 70 days to go from their brightest to their dimmest and back to their brightest.

what are variable stars and how many different types of variable stars are there that change in brightness

The brightness of RR Lyrae varies during regular cycles that average less than 1 day.

LPVs’ brightness fluctuates at irregular intervals longer than 80 days.

The cycle for the LPV named Mira, for example, takes more than 300 days.

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Karen Hill is a freelance writer, editor, and columnist for zippyfacts.com. Born in New York, she loves interesting random facts from all over the world.