lol like seriously how do light years work??!!
The time and distance are the same in 2pi/n measured. So all sky distance available as proportion of one unit that is one year that is 2pi. The sites on sky just measuring in this sort of angles the hours mostly. So without term The period answer is 40 pi. Sense have sin as well due that ancient have knew all distances simply adding minimum knowing distance as sinus. Alas the Earth was been in center then. Moons year..and so on...
Light Years measure distance, not time.
A light year is a measure of DISTANCE not time. The distance Light will travel in One Year.
A light year is the DISTANCE light travels in a year. Light travels at 299,792,458 metres per second. If you do the math, you'll find that 1 light year equals 9.460536 x 10^15 metres. Your question is meaningless, like 20 metres is how many seconds?
A Light Year is the distance light travels in 1 year. That distance is about 5,878,600,000,000 miles. 20 light years is 20 times this distance, or about 117,572,000,000,000 miles.
