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 that light travels in one year. the speed of light is 299,792,458 metres per second which is about 371 million mph. Alpha Centtauri is 4.37 light years away so if you were to travel at the speed of light it would take you 4.37 years to get there from earth.