2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11984High quality spectra to be produced by SUBARU 8 meter telescope will be extremely valuable for numerous astronomical projects. Here I concentrate on two classical types of weak broad line objects -- distant supernovae and white dwarfs -- with emphasis of their importance for fundamental physics, not only for astronomy. With regard to recent results of MACHO experiment and HST weak star counts I discuss one exotic possibility: invisible stars made of the so called ``mirror'' matter.6 pages LaTeX, presented at "Baryonic Matter in the Universe and Its Spectroscopic Studies" (November 22 - 24, 1996, Atami, Japan)Astrophysicstext