1 Massage the twitch muscle with your finger for 15 seconds. 2  Usually there are other muscles that twitch like leg cramps, so take 500mg of magnesium citrate capsule daily. 3  If you have headaches, massage the knot at the back of your neck for release.
Â­So to measure really long distances, people use a unit called a light year. Light travels at 186,000 miles per second (300,000 kilometers per second). Therefore, a light second is 186,000 miles (300,000 kilometers).
Best Answer: A light year is the distance light travels in a year, so the time taken is the same as a year on earth (relative to the earth). But relative to the light itself, the time taken is zero; because at the speed of light, time diminishes to zero. So to us on earth, as we watched a beam of light travel one light year, it would seem to take one year; but if we were traveling on that light beam, it would seem to take no time at all. Source(s): AndrewG Â· 5 years ago. Thumbs up.