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Moon: NASA's Lunar Portal
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Moon Facts
Moon Fact
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).

EYES on LADEE: Explore the Moon in 3D
Moon Facts
Out of Shape

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

Earthrise

Seeing the Earth rise from the moon never gets old.

The Moon's Earth-like Core

Research suggests the moon possesses a solid, iron-rich inner core with a radius of nearly 150 miles and a fluid, primarily liquid-iron outer core with a radius of roughly 205 miles. Where it differs from Earth is a partially molten boundary layer around the core estimated to have a radius of nearly 300 miles.

Communication with LADEE

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

Heavyweight

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

Weightless? Not Quite

Gravity on the moon is only 1/6 of that found on Earth.

Earth Lashing

Every month when the moon gets a lashing from Earth's magnetic tail. This has consequences ranging from lunar "dust storms" to electrostatic discharges.

Common Thread

Scientists think that a large object, perhaps the size of Mars, impacted our young planet and knocked out a chunk of material that eventually became our moon. Distinctive oxygen isotopic compositions of moon rocks and Earth rocks show a common ancestry.

Friendly Face

Many of us see a man in the moon -- a human face smiling down at us from the lunar surface. Scientists say the fact that we see a face may be the result of the rate at which the moon slowed down before becoming locked into its current orientation.

Moon Water

In 2009, orbiting spacecraft discovered water molecules on the moon.

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

Bright Names

The light, rugged highlands of the moon are called the "terrae."

The Moon Festival

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

Moon Day

A lunar day (or the time it takes from sunrise to sunrise) on the moon is approximately 708 hours.

Moon Rocks

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

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.

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.

Don't Forget Your Space Suit

The moon is 239,000 miles away from the Earth. It would take almost nine years to walk there.

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).

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Last Updated: 11 Jul 2013