The sun warms up our planet but space is cold. If I lit a candle and stood 20 feet away, I could see the light but not feel the warmth. So, why do we feel warmth from the sun but space isn’t warmed by it?
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There are different ways of warming things.
1. You can blow hot air on it like a convection oven or the HVAC system in your house.
2. You can shine a bright light on it like the hot lights that keep your food warm at a restaurant.
The sun is using option number 2 because there isn’t air in space, and even if there were, the sun is too far away. This is why it’s cooler in the shade on a hot day.
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