“We don’t want to be part of the International Space Station , therefore we want to set up our own. Our station won’t be very big. It will have a mass of 20 tonnes and be used for studies including microgravity tests. It will have provision for people to live for 15-20 days,” Isro chief K Sivan said. India will be part of international collaborations to send humans to Moon and Mars, and colonise the Moon, he said.