The Polyus's flight

TASS's press release

Studies of the new universal Energia launcher started in Soviet Union on May 15, 1987. It is intended for putting into circumterrestrial orbit ships as well as large-sized spaceships, for scientific studies. Composed of 2 stages (...) it is able to put into orbit 100 t of payload (...) The first launch of this rocket took place on May 15, 1987 at 21 h 30, Moscow time, starting from the cosmodrome at Baikonur. It carried with it, as a payload, a second rocket. This one after the separation of the second stage should go in circular circumterrestrial orbit using its principal engine. However because of a failure of the on-board systems it did not succeed in reaching the orbit and crashed in the Pacific Ocean...

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