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Astronomy

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  • $\begingroup$ Thanks for the answer. Yes, using au makes much more sense. But there is still something that bugs me. In the wiki page you linked, 1 solar mass is 1.988*E30 and GM☉ is 1.327 × E20 kg m3s−2 So it's in meters and kilogram format. As I'm using equation F=GMm/r^2; Shouldn't I convert G format to au and solar mass If I am using au in r (distance) and solar mass in body masses? I mean It's basicly same problem with the scale problem I mentioned in the main question. There is something that I can't convice myself about it, and don't know why. $\endgroup$ Commented Sep 23, 2015 at 19:14
  • $\begingroup$ To make it more clear: If you checked my excell sheet, as I am scaling down the lengths, I am also scaling down the masses, so the body densities remain same. Is this really necessary? Length and mass are two independent units, It shouldn't effect the one another when I scale the one down. But on the otherhand, density should remain same. So they are dependent to each other by density afterall? $\endgroup$ Commented Sep 23, 2015 at 19:19
  • $\begingroup$ You don't need to be concerned with density at all. Just convert your units until they have manageable scales. $\endgroup$ Commented Sep 24, 2015 at 13:57