Submillimeter observations made with a rapid-scanning interferometer during the solar eclipse of June 30, 1973 are reported. Reduction, correction, and plotting...

The development of astrophysical observatories in the Canary Islands by the European community is discussed. Consideration is given to principal astronomical...

A study of the observations made on the development and, in some cases, even the decay of 15 large active regions is presented. It is shown that the mature...