Abstract
The main purpose of this two-day meeting was to review recent results in X-ray astronomy in the U. K. and to relate these to their background in current astronomy. However, an important event in 1977 was the launch of the first of the HEAO satellites, HEAO-1, and so we were extremely fortunate in having Dr Friedman of the N. R. L. to describe some of the results obtained by his group with that satellite. It seemed likely that most of the contributions to this meeting would contain very little description of the apparatus used, so I thought that the most useful and, considering the fact that this was the first meeting of the morning, the most agreeable thing I could do would be to describe some of the major experimental equipment that has been used. The first facility available for X-ray astronomy in the U. K. was the Skylark rocket, which was used for the early Leicester survey experiments in the Southern Hemisphere, as well as M. S. S. L. experiments on, for example, fluctuations in the diffuse background. The Skylark programme as such has now been terminated, though the last rocket has yet to be fired, but later papers will give details of significant new results obtained in this way.
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