Question

The distance (in km), from one edge to the other edge of the Milky Way is:

• A. $9.46\times {10}^{17}km$
• B. $9.46\times {10}^{12}km$
• C. $9.46\times {10}^{10}km$
• D. $9.46\times {10}^{19}km$

Answer 1

The correct option is A

$9.46\times {10}^{17}km$

The distance, from one edge to the other edge of the Milky Way is one lakh light year.

1 light year $=9.46\times {10}^{12}km$

$\Rightarrow$ 1 lakh light year $=100000\times 9.46\times {10}^{12}=9.46\times {10}^{17}km$