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https://www.businessinsider.com/nasa-will-attempt-to-knock-an-asteroid-out-of-orbit-in-2022-2019-1
NASA will attempt to knock an asteroid out of orbit for the first time in 2022
The idea is that the DART spacecraft will hit the asteroid at 6 kilometers per second and change its orbital velocity around Didymos. Shutterstock
If an asteroid were to head toward Earth in the foreseeable future, we would be quite defenseless.
To change that, NASA has approved a mission to throw a "small" asteroid off course in October 2022.
The aim of the project is to establish whether we can protect our planet from a future asteroid impact.
If an asteroid were to head toward Earth, we would be quite defenseless, as we have not successfully developed a method that could reduce — or entirely avert — the impact of a devastating collision.
However, that may be about to change. NASA has approved a project called the Double Asteroid Redirection Test (DART), the aim of which is to throw a "small" asteroid off course in October 2022.
The asteroid in question, informally known as Didymoon, is a moon asteroid about 150 meters tall. It's part of a double asteroid system — named after the Greek word for twins, Didymos — in which it orbits another 800-meter asteroid about a kilometer away.