Planet // Current

Microgrants for Climate Projects

The Brighter Planet Project Fund seeks to foster local leadership and seed worthy... more

BrighterPlanet
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3 days ago
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Brighter Planet Better Stars

"It is hard to escape the sense of mastery as the stars move in the wide clear heavens... more

BrighterPlanet
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3 days ago
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5 comments

Climate Campers

Concerned to avert global disaster, the pressure group Climate Campers meet in the... more

worldwrite
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25 days ago
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2 comments

VCAM Mini - Excite the Planet: Viviamo tutti qui.

Siamo tutti costituiti dagli stessi elementi. Tutto il genere umano è costituito... more

LucaMaximilianCaputo
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28 days ago
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7 comments

Beautiful map of our space missions

n October of 1957, the Soviet Union started the Space Age with the launch of Sputnik.... more

akassan
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1 month ago
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L'ORA DELL'AMORE

....La notte è il momento in cui cambia il nostro rapporto con il mondo, anche con il... more

Brooce
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1 month ago
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3 comments

L'ORA DELL'AMORE

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Brooce
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1 month ago
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Danish National news interview with Stephen Bassett on Disclosure of Extraterrestrial Presence

Danish National TV DR2 Udland -- inteview with Washington D.C. Lobbyist Stephen... more

twohseven
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1 month ago
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LA VOSTRA CASA E' QUA FUORI

L'unico modo per imparare a rispettare l'ambiente è conviverci. E conviverci vuol... more

garriele
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1 month ago
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1 comment

CHEETAHS - Running Out of Time!

Cheetahs are the fastest land mammal! Capable of reaching speeds in excess of 70mph... more

BigCat
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1 month ago
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VCAM Mini - Si può viaggiare senza strade?

Risparmiamo energia..ma non la nostra

saleepepeproject
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1 month ago
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The Moon has fascinated mankind throughout the ages. By simply viewing with the naked eye, one can discern two major types of terrain: relatively bright highlands and darker plains. By the middle of the 17th century, Galileo and other early astronomers made telescopic observations, noting an almost endless overlapping of craters. It has also been known for more than a century that the Moon is less dense than the Earth. Although a certain amount of information was ascertained about the Moon before the space age, this new era has revealed many secrets barely imaginable before that time. Current knowledge of the Moon is greater than for any other solar system object except Earth. This lends to a greater understanding of geologic processes and further appreciation of the complexity of terrestrial planets.
On July 20, 1969, Neil Armstrong became the first man to step onto the surface of the Moon. He was followed by Edwin Aldrin, both of the Apollo 11 mission. They and other moon walkers experienced the effects of no atmosphere. Radio communications were used because sound waves can only be heard by travelling through the medium of air. The lunar sky is always black because diffraction of light requires an atmosphere. The astronauts also experienced gravitational differences. The moon's gravity is one-sixth that of the Earth's; a man who weighs 180 lbf (pound-force) on Earth weighs only 30 lbf on the Moon. (The equivalent metric weight (or force) is the Newton, where 4.45 Newtons equal one pound-force.)

The Moon is 384,403 kilometers (238,857 miles) distant from the Earth. Its diameter is 3,476 kilometers (2,160 miles). Both the rotation of the Moon and its revolution around Earth takes 27 days, 7 hours, and 43 minutes. This synchronous rotation is caused by an unsymmetrical distribution of mass in the Moon, which has allowed Earth's gravity to keep one lunar hemisphere permanently turned toward Earth. Optical librations have been observed telescopically since the mid-17th century. Very small but real librations (maximum about 0°.04) are caused by the effect of the Sun's gravity and the eccentricity of Earth's orbit, perturbing the Moon's orbit and allowing cyclical preponderances of torque in both east-west and north-south directions.The Moon has fascinated mankind throughout the ages. By simply viewing with the naked... more