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This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your...

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

Black holes are among the most mysterious objects in the Universe. Weighing up to several billion Suns, massive black holes have long been suspected to be the central powerhouses of energetic phenomena such as quasars. This book contains papers by some of the most influential astrophysicists working in this exciting field. They not only provide spectacular proof of the long-standing paradigm, but unexpectedly reveal that these objects, far from being rare, inhabit the center of virtually every large galaxy.

This comprehensive volume reviews our current knowledge of the origin and evolution of elements, from stellar nucleosynthesis to the chemical evolution of the cosmos. Chapters by leading authorities in the field describe models of how the elements are produced by stars, inbdicating the nuclear processes involved, and how the quantity of elements evolved in our Galaxy and distant galaxies. The authoritative volume is a valuable resource for graduate students and research astronomers.

This comprehensive volume reviews our current knowledge of the origin and evolution of elements, from stellar nucleosynthesis to the chemical evolution of the cosmos. Chapters by leading authorities in the field describe models of how the elements are produced by stars, inbdicating the nuclear processes involved, and how the quantity of elements evolved in our Galaxy and distant galaxies. The authoritative volume is a valuable resource for graduate students and research astronomers.