Fact following fiction? Scientists plan mission to blow up an asteroid 'hurtling towards Earth'

The real version, if it goes ahead in 2015, will see a satellite fired at break-neck speed into a ‘test’ asteroid to see if its course changes.

The aim is to assess whether it would be possible to save Earth using this method, should we discover that an asteroid is on a collision course with our planet.

The mission, called Don Quijote, will involve sending two spacecraft towards a near-Earth asteroid.

One will be an ‘impactor’, which is fired into the asteroid, the other an orbitor that will analyse data from the experiment.

One potential target is a 1600ft-wide asteroid called 99942 Apophis, which experts say does have a minute chance - around one in 250,000 - of hitting Earth in 2036, so it would be useful target practice.

The 500kg impact craft, which will be called Hidalgo, will ram into the asteroid at a speed of around six miles a second.

The orbitor, called Sancho, will scan the collision and monitor whether the asteroid changes direction at all.