Abstract
Many important advances in the techniques of space astronomy have occurred since the last General Assembly. The most widely publicized developments have been those connected with the exploration of the Moon and Mars, where the exploits of such spacecraft as Luna, Zond, Surveyor, Lunar Orbiter and Mariner in revealing the details of the lunar and Martian landscapes have seemed little short of miraculous. The photographs obtained during these flights have already been extensively disseminated and the results of more detailed analysis are best left to Commissions 16 and 17. Although the lunar and planetary developments have been of the highest scientific importance, the space program has also had a number of other successes of equal scientific significance, although characterized by a much more modest scale of engineering achievement. Many types of satellites and space probes have provided detailed measurements of the interplanetary plasma and its associated magnetic fields. The discovery of a sizable number of extra-solar X-ray sources has already established a new branch of astronomy, which has attracted numerous experimenters and captured the attention of many theoretical physicists. Far ultraviolet stellar spectra have been photographed for the first time, both from sounding rockets and with cameras operated by astronauts in the Gemini spacecraft. Solar X-ray astronomy has also advanced very rapidly. X-ray photographs of the Sun are approaching in resolution those made in visible light. Solar X-ray spectra now reveal emission lines down to a wavelength of 6Å and seem to defy all limitations imposed by ‘reasonable’ coronal temperatures.
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Goldberg, L. (1967). Commission des Observations Astronomiques Au-Dehors de L’Atmosphere Terrestre. In: Perek, L. (eds) Reports on Astronomy/Proceedings of the Thirteenth General Assembly Prague 1967. International Astronomical Union Transactions, vol 13B. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3476-0_35
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