how far in miles is a lightyear?

Answer 1

You might be interested in calculating this distance in
miles:

186,000 miles (the speed of light per second)
X 86,400 seconds (the number of seconds in a day)
X 365 days (the number of days in one year)
-----------------
5,865,696,000,000 miles per year

The figure is usually rounded off to read six trillion miles.

Answer 2

A light year is a unit of distance (not time!) equal to the speed of light in a vacuum times the duration of one Julian year--in other words, how far light could travel in a vacuum in a year, assuming no influence by gravitational or magnetic fields. It's used, mostly by laypeople, to discuss the differences in stars. (Professionals prefer the parsec.)

So how far is that? Exactly 9,460,528,410,545,436.2688 meters, and when I say "exactly" I mean it--the meter is defined relative to the speed of light in a vacuum (specifically, as the distance it can travel in 1/299,792,458 of a second), and as the number of seconds in a year is a fixed constant, you can't get more precise than that. You can express the same value slightly less precisely, though, as 5,878,625,373,184 miles.

For what it's worth, a light year is also about 63,241.077 astronomical units, which are the defined as the average distance between the earth and the sun. That's even less precise than the above, though, seeing as the currently accepted length of one AU comes with a 30-meter margin of error.

Answer 3

1 light year = 5.87849981 × 10^12 miles

Answer 4

1 light year [traditional] = 9 454 254 955 488 kilometers\

so roughly 9.5 trillion kilometers

Answer 5

1 lightyear = 5,878,499,814,186.5

Answer 6

You figure it out. Take 186,000 miles a second. times 60, times 60 again, then times 24 and again then, times 365 and you will get your answer.

Answer 7

A light-year is equal to
9,460,730,472,580 km or 5,878,625,373,183 miles

Answer 8

Multiply 299,792,458 times 86,400 times 365.25 and then divide it by 1,609.344


That is the exact answer.
.

Answer 9

A light year is 5,865,696,000,000 miles (9,460,800,000,000 kilometers).

Answer 10

du the math:)
187500miles a second x seconds in a year:)