radiative zone
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How a Star Expands
Meet Betelgeuse, a bright star in the winter constellation Orion. Betelgeuse is a cool red supergiant that we’ll talk about a lot more in just a couple weeks, when we cover variable stars. Not too long ago, it was the…
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What Goes On Inside a Star?
Our sun is undoubtedly the star we know the best. It’s only 93 million miles away — which might seem far, but isn’t that large a distance when you realize that the nearest neighboring star is a whole 4.3 light-years…
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Energy Flow from the Sun’s Core
Ask any climate scientist how we should power our world without fossil fuels, and they’re bound to tell you about wind and solar power. You might be surprised to know that both of these come from the sun. Solar panels…
