Appearing in the composite spectral data of BATSE, EGRET and COMPTEL for GRB 910503, there is a bump at around 1600keV. We perform a statistical analysis on the
Near-infrared images and K-band spectroscopy of the massive starforming region IRAS 23151+5912 are presented.The JHK' images reveal an embedded infrared clu
We present a brief review of predictions of solar cycle maximum ampli-tude with a lead time of 2 years or more. It is pointed out that a precise predictionof th