Darbhanga Planetarium is a planned planetarium in Darbhanga, a northern city of Bihar, India. The planetarium will be spread over an area of three acres. Announced as early as 2012, as part of a larger project that would encompass a similar structure at Gaya and a science park at Patna, suitable land had been acquired by December 2015. A budget of 164 crore rupees was announced for construction in 2018.It is expected to be functional from December, 2021.