> In astronomy and cosmology, 1 and 5 are the same number. Only the orders of magnitude matter when talking about large things. At atomic scales and in photon l

> In astronomy and cosmology, 1 and 5 are the same number. Only the orders of magnitude matter when talking about large things. At atomic scales and in photon length the precise numbers do matter. "I am not interested in a more accurate value." said no scientist ever. It's just easier to measure small things using big tools than to measure big things using small tools, hence astronomy has a disadvantage. Another one is that it isn't easy to create any experiments.