Aupmanyav
I agree with you and I am not aware that Sayana states the speed of light. However I have come across a sloka in Purushasuktha, which states that 75% of the universe is Unknowable. Modern Astronomy is also says this and they call it as Dark matter and Dark energy. Do you think this also a mere chance or they (the aryans of the ice-age) might have used some mental plane which has a capacity of some kind of intuition like this ?