Hello there!
It is just based on the fact that they are closer or further away from the Sun.
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RADIATION. Radio waves, microwaves, IR, light, UV, x-rays, GAMMA waves etc are ALL Electromagnetic radiation. The difference between ALL the above is the frequency, I.E. The number of waves per second. The higher the frequency the more energy.
Answer:
red supergiants is the answer
My Friday is going good and I might get to go over to my BFF house!!!
Answer:
you have to attach the diagram
Explanation: