Even small asteroids can do a lot of damage—and new research shows the James Webb Space Telescope is adept at spotting the tiniest of space rocks.

NASA and European Space Agency collaborating on planetary defense missions to determine if we can deflect near-Earth objects away from Earth.

The American space agency's Dart probe has smashed into an asteroid ... JHU-APL mission systems engineer, said "earthlings should sleep better" knowing they had a planetary defence solution.

The Nasa probe that struck an asteroid in September to try to deflect ... as it would either increase the time available to mount a defence or reduce the size of the needed projectile.