The Tunguska Event-Greatest explosion in Siberia

Another hypothesis which assumed that the objects of the cosmos that have difficulty in steering system so that almost hit the Earth's surface. Thus at the last moment he was forced to make a correction toward a nuclear rocket motor lit, so he managed to leave the earth to continue its journey towards the planet Venus.

Whatever the reason, we should feel grateful that the terrifying explosions did not occur on one metropolitan city, but in sparsely populated areas. However, according to Ian Ridpath (Messages from the Stars, Fontana / Collins, Glasgow 1978), in the 1977 scientists announced the discovery of the Soviet Union chonditer carbonaceous materials commonly found in the comet's head.
Does this puzzling Tunguska been answered for the umpteenth time efflux