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Moon: NASA's Lunar Portal
Moon Facts
Moon Fact
Genesis Rock

The age of the oldest rock collected by the Apollo astronauts is 4.5 billion years old.

EYES on LADEE: Explore the Moon in 3D
Moon Facts
Moonquakes

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

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.

Tiny Temblors

"Moonquakes" are millions of times less powerful than earthquakes.

Moon Dust

The moon's surface is covered by a pile of rock fragments and dust called lunar regolith. The thickness of the regolith varies from about 5 m on mare surfaces to about 10 m on highland surfaces.

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.

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.

Out of Shape

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

First Step

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

Long Road

It would take 135 days to drive by car to the moon at 70 mph.

Moon Rocks

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

Moon Phase Simulator

Interested in learning more about the phases of the moon?

Try the University of Nebraska's Lunar Phases Simulator.

Is There an Atmosphere on the Moon?

Relative to Earth, the moon is highly depleted in iron and in volatile elements that are needed to form atmospheric gases and water. However, there is an atmosphere.

Orange Rocks on the Moon

How did orange soil appear on the moon? This mystery began when astronaut Harrison Schmidt noticed the off-color patch near Apollo 17's Taurus-Littrow landing site in 1972. Astronauts scooped up some of the unusual orange soil for inspection back on Earth. Lunar geologists now think that the orange soil was created during an ancient fire-fountain.

Constant Companion

It takes about a month for the moon to orbit Earth (27.3 days to complete a revolution, but 29.5 days to change phases from new moon to new moon).

Seeing Seas

The face of the moon is marked by regions, called mare (Latin for "sea"). Galileo, who thought the dark featureless areas were bodies of water, named these regions. We now know them to be basalt (a type of lava) filled impact basins.

The Wolf Moon

When the snows were deep in January, wolf packs would often howl near Native American villages, prompting the title "full wolf moon" for the first full moon in January (according to climatologist Brent McRoberts of Texas A&M University).

Our Drifting Moon

Did you know the moon is moving away from the Earth at a rate of 1.5 inches per year?

Read More

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.

Hot Rocks

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

Moon Phases

Full moons occur every 29.5 days. The moon keeps the same side to us, but not always the same face. Because of the tilt and shape of its orbit, observers see the moon from slightly different angles over the course of a month.

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