2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/12096I review the axionic solution of the strong CP problem and current status of the cosmic axion search.14 pages postscript, Talk presented at The 2nd Int. Workshop on Gravitation and Astrophysics, ICRR, Univ. of Tokyo, Nov. 17--19, 1997. Some typo errors are correctedAstrophysicsHigh Energy Physics - Phenomenologytext