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Infrared observations of symbiotic stars, together with simultaneous optical and ultraviolet observations are demonstrated to be a powerful tool for the understanding of their nature.

Visual, scaled comparisons are made among prominent volcanic, tectonic, crater and impact basin features photographed on various planets and moons in the solar system. The volcanic formation Olympus Mons, on Mars, is 27 km tall, while Io volcanic plumes reach 200-300 km altitude. Valles Marineris, a tectonic fault on Mars, is several thousand

NGC 2841 has been mapped in the J and K near-infrared bands out to some 10 kpc from its center. Maps and radial profiles in micron(J), micron(K) and J-K are presented, and profiles in B-J and B-K derived. The bulge and disk are very well distinguished, but there is also an indication of a bluer ring in the disk between 2 and 7 kpc galactrocentric

A ≡7 hour observation of the central part of the Coma cluster of galaxies has been performed with the EXOSAT LE telescopes and CMA detectors. Five serendipitous sources are detected within the inner 35 arcmin radius of the field. Optical spectroscopy demonstrates that at least three of these are background AGN not associated with the cluster. At