The internal structure and physics of stars such as our Sun, the physical conditions of the gas surrounding many hot stars in our Galaxy, and the workings of so-called active galactic nuclei are diverse areas of modern astrophysical research. Donald Osterbrock, who died on 11 January, made fundamentally important contributions to all of them, tackling their central questions with theoretical understanding and observational skill.
Astrophysics Of Gaseous Nebulae And Active Galactic Nuclei Pdf Download
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