The Science of Sustainability

Tag: earth

Weighing in With Gravity

Weighing in With Gravity

Feel like you've gained a couple of pounds over the holidays? Try the geo-gravitation weight loss field trip plan!

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Sizing Up the Earth

Sizing Up the Earth

What has a mass of about 6 yottakilograms, occupies a volume of space of about 1 million million cubic-kilometers, and is about 40 kilometers fatter than it is tall. Guesses, anyone?

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The Once and Future Earth

The Once and Future Earth

How will the sun, moon, and Earth change in the far distant future? It may not make a big difference to us, but exploring the possible fate of our home and birthplace is a mind-bending journey.

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Luna Nova: Moon of the Cretaceous Skies

Luna Nova: Moon of the Cretaceous Skies

Although I am a lifelong fan of science, I’ve also been a lifelong fan of science fiction—so I sometimes experience conflict on the borderlands where the two meet.

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Sun-Earth Day: Magnetic Magic

Sun-Earth Day: Magnetic Magic

Saturday, March 20th, was not only Vernal Equinox, but the annual Sun-Earth Day: a NASA-promoted effort around the country to focus attention on the special connections between the Sun and the Earth. This year's theme: magnetism!

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Age of Aquarius: Are We There Yet?

Age of Aquarius: Are We There Yet?

"Can you tell me about the upcoming beginning of the Age of Aquarius?" said the voice on the phone. "I heard that it starts this Saturday…."

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Messages from Mercury

Messages from Mercury

MESSENGER is the space probe that NASA sent to Mercury to give the Solar System's innermost planet the first up-close look since 1975, when Mariner 10 flew by. The MESSENGER's main mission will begin in earnest when it returns to Mercury and finally settles into an orbit around the planet, on March 18th 2011.

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The Asteroid Hunters

The Asteroid Hunters

On July 14th, 2008, an almost Hollywood-like drama took place in space nearby: a "double," or binary, asteroid whizzed past Earth, grazing by at a distance of only 1.4 million miles. One of the rocks is over 200 meters across, the other a whopping 600 meters– about half the size of Half Dome in Yosemite!

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