Abstract
Recent advances in the field of opacity calculations for stellar envelopes are summarized. The methods used and the results obtained in the last decade by two independent groups are discussed briefly. Some of the important effects of the new data on astrophysical studies are outlined. Because this review is meant for the 26th EGAS Conference, the size and accuracy of the new set of radiative atomic data produced by the international Opacity Project are emphasized. Potential users of such data are encouraged to get acquainted with the database service known as TOPbase and recently installed at the CDS (Strasbourg, France) for general Internet access.
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