The propagation of interstellar jets is examined by means of numerical modeling. The jets result from the injection of an overpressured supersonic beam of gas into the interstellar medium, and have been followed time dependently up to distances of 0.2 pc from their injection point while preserving a high degree of collimation. As the jets propagate

CCD maps are presented of the inner 1.4 kpc of NGC 4736 in the B, V, R, I and Z bands, along with an ellipticity analysis of these, in which the ellipticities and position angles of isophotal best-fit ellipses are given as functions of galactocentric radius in each band. Also provided are calibrated profiles through the nucleus in individual bands

The discovery is reported of a new lithium super-rich carbon star, IY Hya, and the Li abundance in three other carbon stars (T Sgr, WZ Cas and WX Cyg), previously known as super Li-rich stars is derived. All these stars show abundances in the range log N(Li) = 4.5 (i.e., 10 to 100 times higher than the present cosmic value). Two of them (WX Cyg and

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The orbital evolution of dust particles initially located outside the equatorial plane is considered. The averaging method is used to solve equations of motion. It is concluded that dust particles move in circular orbits perpendicular to the rotational axis and that the radius of these orbits depends on particle size and star luminosity.

The paper presents CO and (C-13)O J = 2-1 spectra and mapping of bipolar outflows, acquired with the 12-m NRAO antenna at Kitt Peak, for the following sources: Cep A, K 3-50, NGC 1333, NGC 2264, S 88B, NGC 6334 V, and NGC 6334B. For most of these sources, the mapping represents the highest resolution mapping so far obtained. As a result, new