"Tsar Rocket" - this is how the super-heavy launch vehicle N-1 was called for its colossal power and size (carrying capacity up to 100 tons, height over 100 meters - twice as much as the legendary R-7).< p> "Swan Song" by S. P. Korolev, N-1 became the main stake of the USSR in the "moon race", and in the future it was supposed to ensure the assembly of TMK (heavy interplanetary spacecraft) in orbit for manned flights to Mars and Venus.But like the Tsar Bell that never rang and the Tsar Cannon, which never took part in combat, the Tsar Rocket never went into space.All four test launches of the N-1 were unsuccessful, and after the untimely death of Korolev and the landing of the Americans on the moon, the expensive program to create the Soviet lunar base Zvezda was curtailed.Why did the USSR lose the "lunar race"?