How does non-euclidean geometry effect light traveling in space?
You can’t use light to prove the age of the earth. All you can do is prove the age of the universe. Edit: No, that just means that planet and its star are billions of years old. If the earth formed yesterday it would still receive that light. Also, you can’t detect a planet that far away, only supernova, galaxies, and other very bright objects. And it is logical. We accurately measure distance, and the speed of light must be constant. If it was higher or lower, the energy-mass equivalence (E=mc^2) would result in nuclear reactions producing a different amount of energy. This would completely alter the way stars act and life could not exist. The age of the earth is derived through other methods.
