Raumflugplanetarium Cottbus, Planetarium in Cottbus, Germany.

The Raumflugplanetarium Cottbus is a facility with a modern projection dome in the city of Cottbus. The dome's digital technology shows sky objects and astronomical phenomena as they appear from Earth's surface.

The Raumflugplanetarium "Juri Gagarin" Cottbus opened on 26 April 1974 at today's Lindenplatz after nearly two years of construction, and was named after Yuri Gagarin (1934–1968), the first human in space. The city of Cottbus ran it until 2007, when the non-profit association Planetarium Cottbus e.V. took over operations while the city kept ownership. From January to mid-June 2013 the building was modernised inside and out, and the original Carl Zeiss Spacemaster star projector, in use until the end of 2012, was replaced by a Chronos II – InSpace hybrid system.

The planetarium is named to honor space exploration history, drawing visitors who want to learn more about the sky. Regular lectures and exhibitions show how people have looked at the stars and understood their importance over time.

The planetarium stands at Lindenplatz in Cottbus, and the dome seats 91 visitors per show. Some programmes are offered in English or Polish as well as German, so check which language a given show uses before booking. The building was modernised inside and out from January to mid-June 2013.

The dome can display the exact positions of thousands of sky objects, making it possible to see the sky at different dates and from different locations. Visitors can experience what the starry sky looks like from anywhere on Earth, not just from Cottbus.