Scicomm specialist for 
The Milky ... Weigh. *Ba dum tss*https://www.technologyreview.com/the-download/613088/we-now-know-how-much-the-milky-way-galaxy-weighs/ …
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[Quietly snickers]
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Articles says half of the mass comes from the dark matter but in Universial ratio it is %27,Why does milkyway has more dark matter?
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The article says more than half of the mass, because its actually close to 90% according to the ESA link below. I'm not sure of the reason for those specific amounts. I'd be curious if they are lumping dark energy and matter together in the at number. http://sci.esa.int/hubble/61198-hubble-and-gaia-accurately-weigh-the-milky-way-heic1905/ …
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But, if I remember correctly the formula(estimation) for weight is W=F= m*acceleration(due to gravity) But, what do we mean here by the acceleration in terms of the galaxy. I do not want to contradict but I think they calculated the MASS and NOT the WEIGHT. Help if I am wrong.
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