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Bus-size asteroid to safely zoom by Earth, NASA says
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Bus-size asteroid to safely zoom by Earth, NASA says

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CAPE CANAVERAL, Fla. — An asteroid the size of a school bus is headed our way, but NASA says the space rock will zoom safely past Earth on Thursday.

The newly discovered asteroid will come within 13,000 miles of Earth, well below many of the communications satellites orbiting the planet, scientists said this week. The closest approach will occur Thursday morning over the southeastern Pacific Ocean.

Asteroid 2020 SW, as it is known, was discovered last Friday by the Catalina Sky Survey at the University of Arizona in Tucson. Once it's gone, the asteroid won't be back to Earth's neighborhood until 2041.

Asteroid Flyby

This image from video made available by NASA's Center for Near-Earth Object Studies shows the path of asteroid 2020 SW past Earth. At bottom right is the moon.

Scientists estimate the asteroid is between 15 feet and 30 feet. By asteroid standards, that's considered puny. Asteroids of this size hit Earth's atmosphere and burn up once every year or two, said Paul Chodas, director of the Center for Near-Earth Object Studies at NASA's Jet Propulsion Laboratory. There could be as many as 100 million of these little asteroids out there.

The real threats are considerably bigger asteroids. The good news is that these are easier to spot much sooner than just a few days out.

Here are six things you may not have known about asteroids:

Photos from the Hubble telescope

Here are some of the iconic images sent by NASA's Hubble Space Telescope.

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