NASA will crash a $488 million spacecraft into an asteroid. Here's why

In eight days, NASA will crash a spaceship on purpose into an asteroid, spending $US330 million ($AUD487.5 million) to try to change the path of the asteroid.

It's the first mission of its kind to test technology that could protect Earth from a possible asteroid collision.

So, what is DART's goal? And should we worry about the strike by NASA? What's the point of this? 

Engineers in space want to learn how to move asteroids away from Earth in case one is ever found on a path to hit it.

The Double Asteroid Redirection Test, or DART mission, will help find out if crashing a spacecraft on purpose into an asteroid is a good way to change its path

This brings up disaster movies like "Don't Look Up" and "Armageddon," even though astronomers don't think something like that is likely to happen in the near future.

DART is the first mission of its kind to test technology that could protect Earth from a possible asteroid collision.