A billion years ago, two massive galaxies collided together, ripping apart tails of gas and dust from each other. The two galaxies then merged to form a single galaxy, NGC 7252. Located 220 million light years away in the southern constellation of Aquarius, the optical images show stars and gas twirling around in intricate filaments around a bright central core. These loops resemble a picture of electrons going around the nucleus, and hence NGC 7252 was named 'Atoms for peace' galaxy, in honour of the influential speech by the US President Eisenhower in 1961, where he advocated the use of nuclear energy for peaceful purposes. The effects of the violent collision are evident from the furious star forming activity going on in the two tails of the galaxies. These tails of gas and stars were pulled out from the galaxies in their dance around each other before their merger. Since ultraviolet light traces young hot stars, Koshy George and his collaborators used the Ultraviolet Imaging Telescope (UVIT) of AstroSat to trace the locations of ongoing star formation along the tidal tails. Using their data, they were able to measure the rate at which new stars are being formed, and study how this rate changes as we move along this tail. These studies have been published in this paper. https://arxiv.org/abs/1802.09493