Birla Planetarium, Science planetarium in Kotturpuram, Chennai, India.

Birla Planetarium is a planetarium in Kotturpuram, Chennai, with a 15-meter aluminium inner dome and a 236-seat air-conditioned theatre. Its GOTO GM II starfield projector and special-effects projector simulate celestial motions. A circumferential hall of fame around the theatre displays portraits and statues of scientists and models of space missions.

President R. Venkataraman opened the facility on May 11, 1988, making it the fifth B. M. Birla planetarium in India. The full-dome projection system was added later, expanding the technical capabilities of the shows considerably.

Shows are staged in Tamil and English, and the programme themes change every three months. The circumferential hall of fame around the main theatre holds portraits and statues of scientists plus models of celestial bodies and space missions; in 2009 the U.S. Consulate in Chennai donated portraits of Neil Armstrong, Sunita Williams and Kalpana Chawla.

The building opens at 10 in the morning and closes around 6 in the evening, with shows scheduled at set times throughout the day. Seating is numbered, so arriving a few minutes before a show begins helps with orientation.

The facility was the first planetarium in India to install a 360-degree sky theater in 2009, using mirror projection technology. Visitors can sit completely surrounded by celestial bodies during shows, with no part of the space left unlit.