SanderBuruma
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Hi all,
I've been wondering over the last couple days over the speed of light and what reference frame it is based on. Officially (ie. on Google/Wiki) the speed of light is 299,792,458 m/s. The problem I haven't found an answer for yet is what that is in reference to?
Is in reference to the earth, the sun, the galactic core or something else? If it is in reference to the sun then the value may be off by up to ~400m/s due to the earths rotation. If it is in reference to the Great Galactic Core (of our galaxy) then it'll vary by up to 30km/s depending on which way our orbit is inclined compared to the suns path of travel and our position along our orbit at the time of measurement.
How accurately do we know for sure that our measure of the speed of light is?
I've been wondering over the last couple days over the speed of light and what reference frame it is based on. Officially (ie. on Google/Wiki) the speed of light is 299,792,458 m/s. The problem I haven't found an answer for yet is what that is in reference to?
Is in reference to the earth, the sun, the galactic core or something else? If it is in reference to the sun then the value may be off by up to ~400m/s due to the earths rotation. If it is in reference to the Great Galactic Core (of our galaxy) then it'll vary by up to 30km/s depending on which way our orbit is inclined compared to the suns path of travel and our position along our orbit at the time of measurement.
How accurately do we know for sure that our measure of the speed of light is?