To determine the national average wage index for calendar year 2013, we multiplied the 2012 national average wage index of 44,321.67 by the percentage change in average wages from 2012 to 2013, as measured by annual wage data we tabulated.
A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the sun, Earth, and moon are aligned (in syzygy) exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can occur only the night of a full moon.
Earth Blocks the Sunlight. During a Total Lunar Eclipse, the Sun, Earth and the Moon form a straight line. Earth blocks any direct sunlight from reaching the Moon. The Sun is behind Earth, so the Sun's light casts Earth's shadow on the Moon.