The radius of the milly way is 3.9 x 10 to the 20th power. What is the diameter?

d=2r

~~~~~~~~~~

Diameter of Milky Way is 2 · 3.9×10^{20} = 7.8×10^{20}

The radius of the milly way is 3.9 x 10 to the 20th power. What is the diameter?

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d=2r

~~~~~~~~~~

Diameter of Milky Way is 2 · 3.9×10^{20} = 7.8×10^{20}

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