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).
One light years is equal to approx 6.5x10^5 earht s years. Light year is a unit of distance compared with that of earth s year. One light second is equal to 3x10^8 meters while an earth s second is equal to 463.8 meters.