On the evolution of astrophysical objects

A scenario is suggested for the development of astrophysical objects. The equations derived are applied to the protostar—T Tauri star—flare star evolutionary sequence. The ages of the Orion, NGC 2264, and NGC 7000 stellar associations are estimated.Translated from Astrofizika, Vol. 37, No. 1, pp. 83–96, January–February, 1994.In conclusion, I wish to thank Professor L. V. Mirzoyan for very useful critical remarks, allowance for which considerably influenced the quality of this paper.