Zenit is a family of space launch vehicles designed by the Yuzhnoye Design Bureau of Ukraine.
Zenit was built in the 1980s for two purposes: as a liquid rocket booster for the Energia rocket and, equipped with a second stage, as a stand-alone rocket. Moreover Zenit was planned to take over manned spaceship launches from Soyuz, but these plans were abandoned after the fall of the Soviet Union.
Zenit-3SL is launched by the Sea Launch consortium's floating launch platform in the Pacific Ocean and Zenit-2 is launched from Baikonur Cosmodrome in Kazakhstan.