The Sun is a star in the Milky Way galaxy. When viewed from the side, the galaxy

Question

The Sun is a star in the Milky Way galaxy. When viewed from the side, the galaxy looks like a disk that is approximately 100,000 light-years in diameter (a light-year is the distance light travels in one year) and about 1000 light-years thick.

Part A What is the diameter of the Milky Way in meters?       

Part B What is the diameter of the Milky Way in kilometers?   

Part C What is the diameter of the Milky Way in miles?   

Part D What is the thickness of the Milky Way in meters?  

Part E What is the thickness of the Milky Way in kilometers?  

Part F What is the thickness of the Milky Way in miles?

Explanation / Answer

A.1 lightyear = 9.461*10^15 m

so

100000 lightyear diameter = 9.461*10^20 m

B. 1 lightyear = 9.461*10^12 km

So,

100000 lightyear diameter = 9.461*10^17 km

C,

1 lightyear = 5.879*10^12 miles

So,

100000 lightyear diameter = 5.879*10^17 km

d.1 lightyear = 9.461*10^15 m

so

1000 lightyear thickness = 9.461*10^18 m

E. 1 lightyear = 9.461*10^12 km

So,

1000 lightyear thickness = 9.461*10^15 km

F,

1 lightyear = 5.879*10^12 miles

So,

1000 lightyear thickness = 5.879*10^15 km

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