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Relive the Apollo 8 Earthrise

45 years after Apollo 8's historic first, everyone can experience what it was like to see the "blue marble" rise above the limb of the moon.

Lunar Dust Problem Re-opened

Long-lost Apollo data on lunar dust accumulation has been found, showing a tenfold increase over previous estimates. What does that imply about the age of the moon?

Cosmic Whacks as Creative Forces

Asteroid impacts are some astronomers' answer to everything, except when they are shown to be unworkable.

Mystery Moon (and Meteorites, and Stars)

One would think astronomers would not be stumped in 2013 by common objects like the moon, meteors and stars. But they are. It's driving them mad.

Fresh Impacts Viewed on Mars, Moon

New impacts observed on the moon and Mars allow space scientists to learn about crater formation in near real time. What conclusions can be drawn?

Moon Water and Magnetism Mystifies Astronomers

Two mysteries from the moon are forcing revisions to textbooks. One concerns water in moon minerals. The other concerns the moon's magnetic field.

Lunar Impact Theory Is All Wet

Significant amounts of water in lunar rocks cast into doubt the popular impact theory for the origin of the moon.

Astronomy Grab Bag

For year's end, here's a clean-out of astronomy articles—from planetary science to cosmology—to motivate further inquiry.

The Missing Zinc: Moon Rocks Still Tell Tales

Apollo ended 50 years ago, Neil Armstrong is dead, but lunar geologists are still using the moon rocks they brought home to construct a story of the moon's "evolution".

Sun, Moon and Stars in the News

What's up in astronomy? Surprises, by heavens.

Our Poisonous Moon: Better from a Distance

The moon stabilizes Earth's axis and regulates the tides, but enjoy it from a distance. Now there are more reasons you wouldn't want to live there.

Crater Count Dating Still Unreliable

Worries about the crater count dating method, widely relied upon to infer ages of planetary surfaces, began emerging in 2005. Those worries have not subsided; they have only grown worse. Crater numbers may have nothing to do with age.

Planet Theories vs. the Evidence

Planet theorists are putting up a valiant fight against new findings, but in some cases, the evidence seems to be winning.

Lunar Upsets Challenge Paradigms

Forty years after the last moonwalkers came home, new discoveries about the moon are calling into question what scientists know about our celestial partner. But is it legitimate for scientists to invoke mystery forces when a favored theory faces falsifying evidence?

Tilt-A-World: Another Constraint on Habitability

Did you ever ride a Tilt-A-Whirl, one of those cheap carnival rides that makes you dizzy and sick? Our planet would be like that if its inclination were out of control. Without tilt stability, a new study reveals, we wouldn't be sick, we'd be dead, or never alive in the first place. It's not enough to be in the Habitable Zone. Would-be inhabited planets need to avoid a new problem, called “tilt erosion.”
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