Cepheid Variable Gives Us A Spectacular Puppis Show

For most of its life, a star is pretty stable, slowly consuming the fuel at its core to keep it shining brightly, but once most of the hydrogen that stars use as fuel has been consumed, some stars evolve into very different beasts -- pulsating stars. They become unstable, expanding and shrinking over a number of days or weeks and growing brighter and dimmer as they do so.read more

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