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Calculate the average density of the Milky Way galaxy
The task is to calculate the average density of the Galaxy, using the following assumptions. First, find the average distances of the 6 nearest major galaxies to the Milky Way, and assume the Galaxy occupies a sphere of diameter half this average distance. Assume a galaxy is 'major' if its mass is greater than 50% of the Milky Way, otherwise minor.
Find figures for the mass of the Galaxy (including central black hole and minor/ satellite galaxies within the sphere) and any other matter amounting to more than 0.01% of this.
Divide the mass by the volume to get density (in gm per cubic centimetre).
Results for this zomb have been placed in the vault.You can access it for free.
In the attached PDFs are Darin Ragozzine's results for this zomb, together with notes on assumptions and methods used. Darin's result for the density of our Milky Way Galaxy is 10^-29 gram / cubic centimetre, with an accuracy of about one order of magnitude either way (10^-28 to 10^-30 g/cc).
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