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).
If you were traveling at the speed of light (186,000 miles per second) then it would take you 20 years to travel 20 light years. A light-year is a measurement of the distance â¦that a beam of light would travel in a year. Modern interplanetary spacecraft can not travel anywhere near the speed of light, not even one percent of it! A beam of light would travel to from Earth to Pluto in around 6 hours.