This text starts with an introduction to the night sky and an overview of stars, their basic properties, and observations. It then discusses basic physics concepts relevant to stellar observations, such as radiation, electromagnetic spectrum, photometry, continuous and discrete spectrum, and spectral lines and their properties. The text describes instruments used for astronomical observations as well as how the radiation received is characterized and interpreted to determine the properties of stars. The author also explores how the stellar spectrum is used to classify the stars on the basis of their surface properties.
Pankaj Jain obtained his doctoral degree from Syracuse University, New York, USA. He subsequently carried out postdoctoral research at the Massachusetts Institute of Technology (MIT), Cambridge, USA; West Virginia University, Morgantown, USA; University of Kansas, Lawrence, USA; and University of Oklahoma, Norman, USA. Dr. Jain is currently a professor in the Physics Department at Indian Institute of Technology, Kanpur. He is a theoretical physicist, whose chief interests are in high energy physics and cosmology. Presently, he is working on the models of dark energy and dark matter, cosmic microwave background radiation, observational tests of the cosmological principle, fundamental symmetries of nature, ultra-high energy cosmic rays, and strong interactions.
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