How long does it take to get to Mars and why is it so difficult?
Summer 2020 is a popular time for missions to Mars because of the way the planets align - but how long does it take to get there?
Nasa Mars 2020: The first aircraft to fly on another planet
Ingenuity is a 1.8kg (4lb) helicopter that will ride to Mars inside Nasa's Perseverance rover.
Illustrated guide to the Mars sample return missions

An audacious mission to bring rock samples from Mars back to Earth is about to begin - find out more with our illustrated guide

Read more