There are all kinds of scary scenarios for the future of our planet, but how real are they? Will the Sun ever swallow us whole? When a star runs out of its fuel, it grows to a million times its original size. As the star grows, it engulfs any matter – even its own planets! – in its wake. Astronomers have watched stars right before or straight after swallowing entire planets. So, will the Sun eventually swallow our Earth?

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