Energia (Russian: Энергия, romanized: Energiya, lit. 'Energy'; GRAU 11K25) was a super-heavy lift launch vehicle. It was designed by NPO Energia of Soviet Union for a variety of payloads including the Buran spacecraft. Control system main developer enterprise was the Khartron NPO "Electropribor". The Energia used four strap-on boosters each powered by a four-chamber RD-170 engine burning kerosene/LOX, and a central core stage with four single-chamber RD-0120 (11D122) engines fueled by liquid hydrogen/LOX.The launch vehicle had two functionally different operational variants: Energia-Polyus, the initial test configuration, in which the Polyus system was used as a final stage to put the payload into orbit, and Energia-Buran, in which the Buran-class orbiters were the payload and the source of the orbit insertion impulse.
The launch vehicle had the capacity to place about 100 tonnes in Low Earth orbit, up to 20 tonnes to geostationary orbit and up to 32 tonnes via translunar trajectory into lunar orbit.The launch vehicle made just two flights to orbit before being discontinued. Since 2016, there have been attempts to revive the launch vehicle.