One magnetar is only about a light-year from the black hole at the center of the Milky Way.
In popular writings, another unit: a light-year, has for a very long time been employed.
The figures of the light-year dials were meaningless to his comprehension.
The light-year is the distance that light travels in one year.
Our task was easy, because we were about half a light-year from the sun.
Bearings agree, and distances check to within a light-year, which is as close as we can hope to check on as small a mass as a man.
You were about right for distance, and within a few tenths of a light-year laterally.
By your figuring, we shouldn't be yet one light-year on the way.
One could imagine falling forty-two thousand miles, where one couldn't imagine falling a light-year.
We are still one light-year distant from Alpha Centauri, the nearest of the bright stars.
The distance that light travels in a vacuum in one year, equal to about 9.46 trillion km (5.88 trillion mi). Light-years are used in measuring interstellar and intergalactic distances. Compare astronomical unit, parsec.