EU Del

EU Delphini

EU Delphini and the Small-Amplitude Pulsating Red Giants

Pulsating Red Giant Stars

As stars like the sun approach the ends of their lives, and begin to run out of fuel, they expand and cool, and become red giant stars. During this stage, they become unstable and begin to pulsate -- at first with a very small amplitude, but eventually with a very large amplitude.

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