Soft land on Moon - Done. Mission to Sun - Done. Test flight for Gaganyaan (India's first manned spaceflight) - Done. Next up - Venus and Mars. India's space research agency - ISRO - has set its sights on Earth's planetary neighbours and expects to mark the country's presence on Mars and Venus within five years, Dr M Sankaran, Director of the UR Rao Satellite Center in Bengaluru told NDTV. Dr Sankaran - who heads the "powerhouse" unit behind the dozens of Indian satellites in orbit - identified some challenges, but revealed that internal talks on mission concepts are already underway.