+0  
 
0
800
1
avatar

A lightyear is 10 000 000 000 000 km. Our own galaxy, the milkyway, is 100 000 lightyears a cross. Wright a lightyear in kilometers as a tenfold.

 Sep 9, 2014

Best Answer 

 #1
avatar+126 
+5

as an exponent it would be, 10^13 km  does that help you?

 Sep 9, 2014
 #1
avatar+126 
+5
Best Answer

as an exponent it would be, 10^13 km  does that help you?

ThAnswerGuy Sep 9, 2014

2 Online Users