Infrared photometric observations (1.25-10 microns) of the compact H II region G45.5 plus 0.1 are reported. Three new sources, which appear pointlike in nature, are discussed; two of them are possibly identifed with faint stars on the Palomar Sky Survey red plate. Evidence is given which indicates that they lie behind cool dust clouds with an

The formational and evolutionary history of natural satellites, their mineralogical composition and other phenomena of scientific interest are discussed. Key scientific questions about IO, Ganymede, Callisto, and Europa are posed and the measurements and instruments required for a Galilean satellite lander in the 1980's are described.

Abstract image available at: http://adsabs.harvard.edu/abs/1977MNRAS.180..461S

Abstract image available at: http://adsabs.harvard.edu/abs/1977A&A....60..109S

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A Michelson interferometer has been built for use with the 91-cm telescope on NASA's Gerard P. Kuiper Airborne Observatory primarily to measure IR line emission from H II regions. Operation is in the rapid scan mode, and the achievable resolution is 0.02/cm in the wavelength range from 10 to around 300 microns. A minicomputer is used to provide on