The evidence bearing on the derivation of the primordial Li-7 abundance is summarized from observations of extremely metal-deficient stars in the galactic halo (Population II). Arguments, primarily observational, but supported theoretically, are presented to show that the Li-7 observed in warm halo subdwarfs has neither been supplemented by Li-7

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The component G 352.2+0.9 of the H II region/star forming complex NGC 6357 has been studied using near IR images and VLA radio continuum observations at 6 cm.

We consider the effect of uncertainties in solar models on the p-mode frequencies of moderate degree (40 l 100). This is done by means of an asymptotic relation that provides a simple way of estimating differences in p-mode frequencies of two solar models. Also, we have investigated the possibility for separating different contributions to the

High resolution visual and IR images of the embedded young cluster associated with the molecular cloud and "blister" H II region GM24 are presented. The cluster contains more than 23 stars, most of them showing large IR excesses at λ ≥ 2.2 μm. The distance to the complex is d = 2.0 kpc and the total luminosity is Ltot ≅ 1.5x105Lsun.