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).
Rating Newest Oldest. Best Answer: a light year is the distance light travels in a year. you should be asking how far not how fast. it's 9.4605284 Ã 10^15 meters, or 9.4 quadrillion meters. (average) distance earth to mars: 78341212000 m. light speed: 299792458 m / s. time to mars at light speed: 78341212000 m / 299792458 m / s = 261 s = ~4.5 minutes.