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Originally Posted by Sil_liS
We are measuring time in years and days and hours and minutes and seconds. The choice of describing the distances between stars and galaxies by lightyears has to do with the order of magnitude of the unit of measure. The terms lightday and lighthour and lightsecond are also used, but they are not the best choice for measuring the distance between galaxies.
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Nor are lightyears, which is why they are used more in science fiction than in reality. The parsec is the preferred unit.
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How do you suppose that we wouldn't measure time in years? Do you assume that we would have no desire to determine the time necessary for our planet to go around the sun?
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I made no comment either way about the initial argument, just that having to use years so that we can use lightyears is not a good reason.