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Harzardous Asteroids

How Do Researchers Track Near-Earth Asteroids?

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Later today, an asteroid designated 2012 DA14 will pass just 17,200 miles over Earth’s surface. Although this 150-foot space rock will slip harmlessly by, researchers estimate there are nearly 500,000 near-Earth asteroids. So far, they’ve tracked the orbit of 9,600. How do researchers track asteroids, anyway? A Science Bulletins video explains more about the process, and more about the odds of an asteroid collision with Earth.

Tags: Meteorites, Science Bulletins

Meteor Crater

Asteroid 2012 DA14's Friday Flyby

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Talk about an eventful Friday night! Tomorrow night, a small asteroid will travel nearer Earth than any astronomers have identified beforehand. “It’s the closest that we’ve seen ahead of time,” says Denton S. Ebel, curator in the Division of Physical Sciences (Earth and Planetary Sciences).

For more about the asteroid flyby, participate in a live Twitter chat with Ebel, this Friday, February 15, at noon ETPost your questions here or use hashtag #asteroidchat on Twitter.

Tags: Astrophysics, Space Exploration

Vertical Farm OGK

Vertical Farming: Growing Up, Not Out

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In the next few decades, the global human population will exceed 9 billion—and 70 percent will live in cities. How can hunger be addressed in this growing population? On Saturday, Februrary 2, speakers from Columbia University and the Sackler Institute for Nutrition Science will present and lead discussions on this topic, and more, in a day of learning; one topic will be vertical farming.

Tags: Our Global Kitchen

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