How many are between the sun and the center of the Milky Way?

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How many are between the sun and the center of the Milky Way?

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Answer 1 · 2016-05-05T03:35:57

If the question is about distance, 2-sd distance is 27 K light years (ly) = $2.5 X 10^{17}$ $2.5 X 10^17$ km.

Explanation:

For conversion $l y \to k m, 1 l y = 6.29 X 10^{4} A U and 1 A U = 1.496 X 10^{8} k m$ $lyto km, 1 ly = 6.29 X 10^4 AU and 1 AU = 1.496 X 10^8 km$

27 k ly = 27000 X 62900 X 149600000 km = $2.5 X 10^{17}$ $2.5 X 10^17$ km

The answer is given in 2-sd only, for parity with the 2-sd data used, 27 K ly. Extra digits might not be that reliable. This is the purpose of increasing unit as ly/parsec/mega parsec/billion ly, for stellar/galaxy/cluster distances.

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How many are between the sun and the center of the Milky Way?

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