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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Heat is a property of stuff, and there is very little stuff in space. In Earth orbit, like if you are on the moon or on a space station, you get a bit more sunlight then if you were outside at noon in the tropics.
If you are standing in Hawaii that energy you get from the sun moves away from you into the air and water and stuff all around you.
If you are in space, that heat just keeps warming you up, so you’d overheat.
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