We present low and high resolution long-slit spectra of three bipolar planetary nebulae (PNe) with bright central cores: A 79, He 2-428 and M 1-91. He 2-428 and M 1-91 have high density (from 103.3 to 106.5 cm-3) unresolved nebular cores that indicate that strong mass loss/exchange phenomena are occurring close to their central stars. An F0 star is

In the paper ``Oxygen in the Very Early Galaxy'' by Garik Israelian, Rafael Rebolo, Ramón J. García López, Piercarlo Bonifacio, Paolo Molaro, Gibor Basri, and Nataliya Shchukina (ApJ, 551, 833 [2001]), in Figures 7, 8, 9, 10, and 11 the OH oxygen abundance for BD +23°3130 is slightly misplaced. The correct figures, which were not included because

During a 50 ks monitoring observation of the Galactic bulge performed in September 1999 by the Wide Field Cameras on board the BeppoSAX satellite, an X-ray burst was detected from a sky position ~ 3degr off the Galactic centre. No previously known X-ray sources are located within the position error circle of the observed burst. The new burster, SAX

File table1.dat contains the identification number, the coordinates (2000), the [OIII]5007 and the Hα+[NII] flux of the candidate PNe detected in Messier 81, using the Isaac Newton Telescope (INT) (La Palma, Spain) in 2000, December and 2001, January. The accuracy on position is approximately 0.5 arcsec. (1 data file).

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We are performing a survey of a sample of 17 radio jets with Chandra and HST, with the aim of finding their X-ray and optical counterparts. In this paper, we present the preliminary Chandra results for the first six sources observed and analyzed so far. In four of them an X-ray jet is clearly detected. We compare the X-ray morphologies to the radio