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).
This post brings the scale of light-years down to the scale of miles and kilometers. The large yellow shell depicts a light-year; the smaller yellow shell depicts a light-month. A light beam takes 8 minutes to travel the 93 million miles (150 million km) from the sun to the Earth.