February 12, 2024
Physicists base deductions about the age and the makeup of the universe on what they’re seeing from light that has been traveling for billions of years.
How do they know that what they’re seeing is the same as the picture that existed when the light began traveling?
Isn’t it possible that light got deflected, or affected by gravitational pulls from various bodies that it passed, or some was drawn into black holes, or something?
Just curious.
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