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Journey to the Center of the Sun

The sun, in ultraviolet light. The colors reveal temperature,
from 1.8 million (blue) to 3.6 million (red) degrees Fahrenheit.

You know that the sun is crucial to life on Earth. But do you know what that bright ball in the sky is actually made of? Well, slather on some SPF 15,000,000 and let's go look.

First, get comfortable. It's going to be a long trip--about 93 million miles (150 million km), depending on where Earth is in its elliptical orbit. Since we've got time to burn, let's brush up on some basic sun facts.

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SciencePhiles