Question from ROLY:

Hi: I searched you database first,no luck.

What is 2.5 million miles x 6 trillion miles (light year)

This is the distance of the ANDROMEDA Galaxy .Thanks.

Roly Backyard astronomer.

Hi Roly.

2.5 million light years times about 6 trillion miles per light year equals

(2.5 x 10^{6}) x (6 x 10^{12}) = 15 x 10^{18}.

Since 10^{18} is a "quintillion", that's fifteen "quintillion" miles. In scientific notation, we'd simplify it to 1.5 x 10^{19} miles.

Cheers, Stephen La Rocque.