Four years after the Chandrayaan-2 mission ended in part failure, the Indian Space Research Organisation (Isro) is making another attempt to land on the Moon. Later this evening, the Chandrayaan-3 mission’s Vikram lander, currently in orbit around the Moon, will begin a slow, calculated descent on to the lunar surface. The landing sequence will begin around 5:45 pm and will last for around a quarter of an hour, a period that a former Isro chief has described as “15 minutes of terror”. Messages for the Indian Space Research Organisation (ISRO) started coming in on Tuesday itself, with leaders from Mamata Banerjee to Arvind Kejriwal wishing it a success.