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Moon: NASA's Lunar Portal
Return to Solar System Exploration
Moon Facts
Moon Fact
Shaping the Moon

Between 4.5 and 4.3 billion years ago, a giant object hit the moon near its south pole and formed the South Pole-Aitken Basin, one of the two largest proven impact basins in the solar system.

Two NASA LRO Videos: "Evolution of the Moon" and "A Tour of the Moon."

EYES on LADEE: Explore the Moon in 3D
Moon Facts
Communication with LADEE

Unlike past missions, LADEE will be using lasers instead of radio waves to communicate with mission control.

Familiar Face

Only about 59 percent of the moon's surface is visible to us here on Earth.

Moon Rocks

Rocks from the moon are similar to three kinds of igneous rocks that are found here on Earth: basalt, anorthosites and breccias.

Surface Boundary Exosphere

The atmosphere of the moon, called a surface boundary exosphere, is likely the same type of atmosphere found on many other planets.

Inverted Moon

As the astronomical telescope with its inverted image came into use, astronomers adopted the habit of representing the way they saw the moon -- upside down. This practice was followed until very recently. Lunar images are now constructed and stored digitally and can be displayed at any orientation. The moon is now typically shown right side up.

Massive Impact Basin

Did you know the largest impact basin in the Earth-moon system is the South-Pole-Aitken basin on the moon measuring 2,500 km in diameter?

Who's the Bunny Girl on the Moon?

Apollo 11 Buzz Aldrin to Mission Control, "Okay. We'll keep a close eye out for the bunny girl."

What was he talking about?

Find out here.

The Moon Festival

Did you know the Chinese and Vietnamese have a festival each year to celebrate the moon?

Space Face

Can you spot the face of the man on the moon?

Moonquakes

There are two types of earthquakes that happen on the moon: deep moonquakes and shallow moonquakes.

Lunar Mascons

Mass is not distributed uniformly inside the moon. Large mass concentrations ("mascons") lie beneath the surface of many large lunar basins and probably represent thick accumulations of dense lava. Relative to its geometric center, the moon's center of mass is displaced toward Earth by several kilometers.

Stuffed Crust

The crust on the far side of the moon is thicker than the crust on the near side.

The far side highlands appear to have formed early in the moon's history, when a magma ocean (shaped by tides caused by Earth's gravity) heated the moon's floating crust non-uniformly. Since then, the magma ocean has solidified.

First Interaction with the Moon

In 1940, the Diana Project was the first experiment to successfully bounce radio signals off the moon.

Hot Rocks

All moon rocks originated through high-temperature processes with little or no involvement with water.

Heavyweight

Total weight: of the moon is 74 sextillion km (that's 81 quintillion tons).

Even Dozen

Only 12 people have ever walked on the surface of the moon.

Out of Shape

The moon is not round, but is in fact egg-shaped with the large end pointed towards Earth.

Snow Moon

Native Americans referred to February's full moon as "Snow Moon." This is due to the cold and snowy weather typically found during the month of February.

First Step

The first human being walked on the moon on 20 July 1969.

Prince of Tides

There are two high tides and two low tides every day on every beach on Earth. This is due to the moon's pull.

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Last Updated: 11 Jul 2013