NASA will hit an asteroid to defend the planet.

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Dimorphos is a lifeless world. A 160-m moonlet is orbiting the Didymos, a 780-m asteroid.

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Didymos-Dimorphos is located in the asteroid belt between Mars and Jupiter, 11 million kilometres from Earth.

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Astronomers will concentrate on Dimorphos on September 26 at 7:14 p.m. ET. At 28,200 km/h, NASA's DART probe will deliberately strike the moonlet (17,500 mph).

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The planet is in peril. Near-Earth asteroids (NEAs), which circle the sun within 45 million kilometres (28 million miles) of Earth, are monitored by NASA's Center for Near Earth Object Studies (CNEOS).

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Although it appears to be a safe miss distance, space debris may collide with an NEA, changing its trajectory and sending it in our direction.

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There are 855 NEAs that are at least 1 km long and more over 10,000 that are at least 140 m long, according to the CNEOS study. 29,801 NEAs of varying sizes are listed by CNEOS.

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As a first test of the novel technique, NASA built DART to intercept and deflect Didymos-Dimorphos on November 23, 2021. a two-spacecraft

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