Nucleocosmochronology of the Solar System matter

The cosmic scale of nucleosynthesis and Universe evolution is presented. According to different long living radioactive cosmochromometers, the ages of elements synthesied in s- and r-processes are corresponding to 13-20 b.y. Assuming the element synthesis begins at the time of Galaxy star formation, the Galaxy age should be also corresponding to the above range. The most adequate value of element age is considered, to be estimated in terms of a model of monostage total Galaxy nucleosynthesis in the explosion of the Protogalaxy core and is equal to 10.9 b.y. A number of observational facts such as osmium isotopic composition, Th/Nd ratio in stars of different age are indicating the monostage element synthesis