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People of Kolkata will be able to witness a 'supermoon' on Tuesday if the monsoon sky permits, former director of M P Birla Planetarium Debiprosad Duari said. A supermoon will again be visible by the end of the month on August 30. The full moon, when it is closest to the Earth, is described as a 'supermoon'. The last time two supermoons were seen in the same month was in 2018, and the next such phenomenon will be witnessed in 2037, he said. "It is exciting as this coincides with the time Chandrayaan 3 module will be injected into the lunar transfer trajectory," Duari said. Chandrayaan 3 is scheduled to make a soft landing on the moon on August 23. "The moon goes around the Earth once in 27.3 days in an elliptic orbit. As a result, at some point in its orbit, the moon will be farthest from the Earth, with the distant point being called Apogee, while at some other time it will be closest to the Earth, with this point being called Perigee," he said. "When we have a full moon near .