As part of the ISO calibration programme, we observed the mid-infrared spectrum of the Zodiacal Light at low and high ecliptie latitudes, using the spectrophotometer ISOPHOT-S. In the 6 um to 12 um range the average spectrum can be reproduced with a T = 264 K blackbody. By combining this blackbody spectrum with photometry from COBE / DIRBE, we

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NLTE effects in iron lines are carefully investigated for the sunspot umbral model of Maltby et. al. (1986). Our model atom is realistic: it has hundreds of levels including many high-excited ones among which infrared transitions take place. The self-consistent solution of the kinetic and radiative transfer equations is obtained using recently

CCD and near-IR broad and narrow-band images of HH 14 and 5 small nebula associated with IRAS sources of low luminosity in star forming regions are presented. Optical and IR reflection nebulae were detected associated to the Class I YSOs PP 9, Gy 4-1 and Gy 2-21 with no evidence of shock excitation, while HH14 and L1455FIR show several prominent H