India's moon mission Chandrayaan-3 made a perfect landing today near the South Pole of the moon. The next big manoeuvre was the rolling out of the Pragyan rover, which will send data from the spot to the lander that will be relayed to space agency ISRO. The launch of the rover, though, took time. This is because the rover cannot be launched till the dust kicked up by the touchdown of the Vikram lander is dissipated. The gravity of moon being a fraction of that of Earth, dust does not settle the way it does on Earth.