Light travel 3*10^8m in one second or 3 lakhs kilometre in one second.
In one year we have 365 days.
The total number of seconds in one year is equal to 365*24*60*60=3.153*10^7 second.
1 light year = (3.153*10^7)*(3*10^8)=9.46*10^15 m.
INFORMATION BITS
Published
Success.com 