the moon

موضوع: the moon الإثنين أبريل 25, 2011 12:14 pm

HI

THE MOON

The Moon is Earth's only natural satellite and the fifth largest satellite in the Solar System. It is the largest natural satellite of a planet in the Solar System relative to the size of its primary (though Charon, which orbits the dwarf planet Pluto, is proportionally larger), a quarter the diameter of Earth and 1⁄81 its mass. The Moon is the second densest satellite after Io. It is in synchronous rotation with Earth, always showing the same face; the near side is marked with dark volcanic maria among the bright ancient crustal highlands and prominent impact craters. It is the brightest object in the sky after the Sun, although its surface is actually very dark, with a similar reflectance to coal. Its prominence in the sky and its regular cycle of phases have since ancient times made the Moon an important cultural influence on language, calendars, art and mythology. The Moon's gravitational influence produces the ocean tides and the minute lengthening of the day. The Moon's current orbital distance, about thirty times the diameter of the Earth, causes it to appear almost the same size in the sky as the Sun, allowing it to cover the Sun nearly precisely in total solar eclipses.
The Moon is the only celestial body on which humans have landed. While the Soviet Union's Luna programme was the first to reach the Moon with unmanned spacecraft in 1959, the United States' NASA Apollo program achieved the only manned missions to date, beginning with the first manned lunar orbiting mission by Apollo 8 in 1968, and six manned lunar landings between 1969 and 1972—the first being Apollo 11 in 1969. These missions returned over 380 kg of lunar rocks, which have been used to develop a detailed geological understanding of the Moon's origins (it is thought to have formed some 4.5 billion years ago in a giant impact event involving Earth), the formation of its internal structure, and its subsequent history.
After the Apollo 17 mission in 1972, the Moon has been visited only by unmanned spacecraft, notably by Soviet Lunokhod rovers. Since 2004, Japan, China, India, the United States, and the European Space Agency have each sent lunar orbiters. These spacecraft have contributed to confirming the discovery of lunar water ice in permanently shadowed craters at the poles and bound into the lunar regolith. Future manned missions to the Moon are planned but not yet underway; the Moon remains, under the Outer Space Treaty, free to all nations to explore for peaceful purposes.

the moon Full_Moon_Luc_Viatour

موضوع: رد: the moon الإثنين أبريل 25, 2011 1:15 pm

Thank you so much

Waiting for new works

موضوع: رد: the moon الإثنين أبريل 25, 2011 1:23 pm

Ur welcome Roro

موضوع: رد: the moon الإثنين أبريل 25, 2011 2:03 pm

Wonderful
Thank you

موضوع: رد: the moon الإثنين أبريل 25, 2011 2:21 pm

great
thank you very much

موضوع: رد: the moon الإثنين أبريل 25, 2011 2:31 pm

welcome

زائر

thank you very much

nice Subject

موضوع: رد: the moon الإثنين أبريل 25, 2011 5:38 pm

Welcome Toto

موضوع: رد: the moon الأربعاء أبريل 27, 2011 5:34 pm

Thank U

Nice Supject

موضوع: رد: the moon الأربعاء أبريل 27, 2011 6:21 pm

Welcome..

موضوع: رد: the moon الجمعة مايو 06, 2011 7:15 pm

thx 4 the sub
keep it`s up
wait yr new`s

موضوع: رد: the moon الجمعة مايو 06, 2011 9:33 pm

welcome Maya

موضوع: رد: the moon السبت مايو 07, 2011 4:29 am

thanx zozo

موضوع: رد: the moon السبت مايو 07, 2011 2:54 pm

welcome

موضوع: رد: the moon السبت مايو 28, 2011 6:55 pm

thank you

موضوع: رد: the moon السبت مايو 28, 2011 8:17 pm

welcome