One of the four Nehru Planetariums in India, is also situated in Teen Murti House grounds. It was inaugurated by the then Prime Minister (and Nehru's daughter), Indira Gandhi, on 6 February 1984. The planetarium's sky theatre is used for screening shows and as a gallery. The planetarium was reopened in September 2010, after renovations worth Rs. 11 crore, ahead of the 2010 Commonwealth Games and received Queen's Baton. It now has 'Definiti optical star projector "Megastar" that can show 2 million stars.