Extragalactic objects

The external galaxies, like our own, are gigantic clusterings of stars (as many as 10 to 10 ) and associated interstellar material. There is a wide variety of shapes 

Photometric and spectrophotometric measurements of a number of external galaxies were obtained with OAO-2 and subsequently were supplemented by more sensitive observations with lUE. Ultraviolet images of the Magellanic Clouds and a number of other galaxies have been obtained in sounding rocket flights, the Apollo 16 mission 

One of the most important objectives of the HST is to determine more accurately the distance scale of the universe it can do this by observing galaxies at much greater distances with the same degree of detail as nearer galaxies are presently observed with ground-based telescopes. Ultraviolet observations are an important aspect of these studies, because the most luminous hot stars are useful distance indicators, and these are much brighter in the UV than in the visible. Also, for 

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Moreover, the extragalactic object 3cl23 was observed to look for the H,C236o. in absorption, and the upper level (3a) for Ti/Tc absorption of 1.5% is achieved. So far, that is rougher than Dr. Matveenko has observed (private communication, 27.04.04, at conference in Pushchino, Russia) the H78a absorption line toward 3c345 quasar (RT100, Bonn) with, probably, amplitude of 0.5%... 

Since the discovery of unexpectedly powerful infrared radiation from extragalactic objects — a discovery now about 10 years old (see Low and Johnson 1965, Pacholczyk and Wisniewski 1967, Kleinmann and Low 1970a,b,and Rieke and Low 1972,inter alia)—the outstanding problems in this field have been to determine... 

Planetary Atmospheres Comets The Stars Interstellar Gas Interstellar Dust Extragalactic Objects... 

Extragalactic objects with significant redshift do not have their lines... 

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