the state government has sanctioned an amount of 1.5 million for the modernisation of the planetarium by providing six-segment multimedia projection system. Shows The planetarium conducts sky shows every day at different times in different languages. The shows include the Solar System, sky and seasons, eclipses, Earth, Man on Moon, comets, shooting meteoroids, stellar cycle and the deep sky. As of 2007, since its inception, the planetarium has introduced 35 programmes on these topics. Audio-visual programs on various aspects of astronomy and different cosmic phenomena are also shown. Program themes are changed every 3 months. Shows are conducted in English and Tamil. The planetarium and the Science and Technology Centre is open on all days except on national holidays from 10:00 am to 5:45 pm. The Science and Technology Centre, however, receives complaints on lack of maintenance of the scientific displays at the science park. Other exhibits DRDO Pavilion In 2013, the Defence Research and Development Organisation (DRDO) began setting up a DRDO pavilion on the planetarium campus in collaboration with Tamil Nadu Science and Technology Centre (TNSTC). The DRDO gallery will have a covered area of 5,000 sq ft built in the existing building, with additional open space made available for large life-size models and exhibits. The pavilion, being constructed at a cost of 8.5 million, is aimed to showcase the works undertaken by the DRDO in its 50 laboratories across the nation in the fields of aeronautics, electronics, armaments, engineering systems, instrumentation, missiles, combat vehicles, advanced computing and stimulation, naval systems, special materials, training, information systems, life sciences, and agriculture. The exhibit will showcase various models of gun, including the advanced machine guns and AK47s, historical developments of gun, construction of cut-section of gun, scale-down model of Brahmos 1.3, a supersonic cruise missile, Prithvi, a tactical surface-to-surface short-range ballistic missile, Agni, a family of medium to intercontinental range ballistic missiles, electronic equipments, electronic radars, electronic and communication systems, and life-supporting devices. It was also exhibit a model of a specialised clothing designed by DRDO, used by the Indian soldiers deployed at Siachen Glacier as protection against freezing temperatures. Renovation The planetarium was renovated beginning around May 2018 and was reopened after 18 months in November 2019. The mechanical projector was replaced by hybrid digital opto-mechanical projector that offers a 360-degree immersive video effect creating high-definition images of the simulated night sky and celestial objects. The decommissioned mechanical projector