If galaxies contain 1 hundred billion stars and there are 1 hundred billion galaxies and 1 in 5 low mass stars like the sun have planets like Earth in the habitable zone and 89% of all stars are low mass like the Earth what is the number of planets that exist in the Universe that are in the habitable zones of their stars?
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If galaxies contain 1 hundred billion stars and there are 1 hundred billion galaxies and 1 in 5 low...
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