Mission to land on the double asteroid is all set to happen in November. Dubbed as ‘mountain in the sky with another rock the size of the Great Pyramid swinging around it’, is first-ever mission involving the act of a team of astronauts landing on an asteroid to destroy it. ESA said in a statement said the mission will “revolutionise our understanding of asteroids and how to protect ourselves from themâ€. The heart-stopping mission has been called Hera.