eli5: Does the light coming from the stars which are light years away still contain some heat or is it lost as the light travels?
In: 1
The main difference between starlight and sunlight is that starlight is dimmer because stars are so much farther away. It gets dimmer because it’s spreading out, so light isn’t being lost (unless there are dust clouds or red-shift). So if you had a star just like the sun but a million times farther away it would light and heat us in the just same way but a trillion times more weakly (because a million squared is a trillion).
Latest Answers