The current name for this day did not come into use until after World War II. Decoration Day and then Memorial Day used to be held on May 30, regardless of the day of the week, on which it fell. In 1968, the Uniform Holidays Bill was passed as part of a move to use federal holidays to create three-day weekends. This meant that that, from 1971, Memorial Day holiday has been officially observed on the last Monday in May. However, it took a longer period for all American states to recognize the new date.
by Jerry Coffey on June 17, 2008. The orbit of Jupiter, like that of all the planets, is elliptical instead of circular. At perihelion(closest approach) Jupiter comes within 741 million km, or 4.95 astronomical units(AU), of the Sun.t its most distant point, called aphelion, Jupiter is 817 million km, or 5.46 AU from the Sun. The average between perihelion and aphelion is called the semi-major axis. Jupiterâs semi-major axis is 778 million km, or 5.2 AU.
The temperature in Jupiter's upper atmosphere is around -145C (-230F). Deeper below the clouds the temperate reaches 21C (70F). Near the planet's center the temperature is around six times hotter than the surface of the Sun! Jupiter has 62 moons, 16 of which have a diameter of at least 6 miles.The four main moons of Jupiter are Io, Europa, Ganymede and Callisto, all discovered in 1610 by Galileo and referred to as the Galilean Moons. The gas giant is the largest planet in the solar system with a diameter of around 89,000 miles (143,000 km). 2  Jupiter is 11 times larger than Earth in diameter and around 10% as large as the sun.