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?
In: 512
Heat is the vibration of atoms. It requires matter to exist because it is an expression of the movement of matter. We experience heat on earth because the light energy from the sun starts knocking around the atoms in the earth’s atmosphere and ground, with different wavelengths of light smacking different atoms around. With little/no atoms to get smacked around, space is cold.
Latest Answers