We have telescopes that scan the skies for asteroids. We have landed a spacecraft on a travelling comet. We are planning the ambitious Hera asteroid deflection mission. What next?

ESA astronaut Luca Parmitano discusses the incredible notion that one day, humans might land on these ancient, rocky masses.

How will we find the right asteroid? How do we ‘park’ next to an asteroid? How can astronauts stay on an asteroid?