How do you stop an asteroid hitting Earth at hundreds of thousands of kilometers an hour?
NASA and the ESA (European Space Agency) may have come up with a solution that might just work.
They have developed a plan called the Double Asteroid Redirection Test (DART) and they want to test it in 2022 when an asteroid will pass by Earth.
If the test works it will be the first time an asteroid has been deliberately knocked off course.
The chance of an asteroid actually hitting the planet is pretty remote but it’s a concern being explored by space agencies around the world.