This is a lecture on Quasars at Caltech. Quasars are a massive and - TopicsExpress

This is a lecture on Quasars at Caltech. Quasars are a massive and extremely remote celestial object, emitting exceptionally large amounts of energy, and typically having a starlike image in a telescope. It has been suggested that quasars contain massive black holes and may represent a stage in the evolution of some galaxies. Fifty years ago, the discovery of quasars transformed astronomy. Studies of quasars and other active galactic nuclei still are a major, vibrant, and developing part of astronomy, astrophysics, and cosmology. This year we celebrate the 50th anniversary of this discovery, and honor Maarten Schmidt, whose insight into the nature of quasar spectra was a decisive milestone in the rise of this new field of research, in addition to his continued contributions ever since. youtu.be/8ykDWIoPKEU

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