NASA will intentionally crash a spacecraft into an asteroid at 15,000mph on MONDAY – and the method could one day save Earth from a deadly impact

by Paul Alexander

The minimum change for the mission to be considered a success is 73 seconds.

  • Double Asteroid Redirection Test (DART) was launched last year and is due to collide with asteroid on Monday

  • NASA's first 'planetary defence' craft will try to deflect asteroid Dimorphos, which is 6.8 million miles from us

  • $325 million mission may sound like the plot of Hollywood blockbuster such as Armageddon or Deep Impact

  • But it could prove useful for altering the course of an asteroid years or decades before it bears down on Earth