NASA is about to collide with an asteroid with a spacecraft.

a lump of space rock so far from Earth that we have no idea what it looks like.

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One of the most metal science experiments ever will take place

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when the Double Asteroid Redirection Test (DART) collides with the asteroid at a speed of more than 14,000 miles per hour.

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NASA is attempting to alter the trajectory of an asteroid using DART.

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It's being described as the first "planetary defence test mission" in history,

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a demonstration of our capability to someday prevent a significant asteroid collision on Earth.

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DART is initially attempting a more direct way by slamming into it at full speed.

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