sun

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Thomas Leveritt recently captured footage of a series of people with an ultraviolet camera. According to Leveritt, "an ultraviolet camera can show not-yet-visible changes" on people's skin, which means lots of freckles. He then had people put on sunscreen to demonstrate how it protects their skin.

Put on some sunscreen, already!

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NASA's Solar Dynamics Observatory has collected data to show what the surface of the sun looks like with a changing range of wavelengths that are invisible to the human eye.

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