The Sun is radiating energy in many spectra. Infrared, visible light, ultraviolet, x-ray, radio, electromagnetic, etc. When that energy hits the Earth, it produces heat. We're not being warmed by the Sun, like in a warm room - in that situation, heat is transfered through some kind of medium, like air. The Sun's radiation hits the Earth and that's how things heat up.

That's why you can have spacecraft in space with solar panels generate electricity purely from the radiation from the Sun.

But, I can guarantee the temperature of the Sun isn't a balmy tropical temperature, it's thousands and even millions of degrees at various places.

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Fraser Cain
Publisher
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