How Many Quasars Are In The Universe
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The History of Our Universe in 21 Stars
Previously published as A History of the Universe in 21 Stars. 'REVISED AND UPDATED ___ 'A wonderful book about the science, history and mythology of 21 stars (and 3 impostors).' Dr David Whitehouse Look up on a clear evening, and you'll see thousands of stars shining in the night sky, each telling a story of their own. With star maps to help easily identify key celestial bodies, astronomer Giles Sparrow takes 21 stars (and three impostors) to look at what each pinprick of light can tell us about the birth, life and death of our universe. From red giants to supernovae and from stellar cities to our own Sun, The History of Our Universe in 21 Stars shows how the lights we see in the sky can help us unravel the mysteries of the cosmos. 'Beautifully written and extremely accessible ... It's extremely difficult to put down! Gemma Lavender
The Farthest Things in the Universe
Author: Jay M. Pasachoff
language: en
Publisher: Cambridge University Press
Release Date: 1994-10-13
This book, first published in 1994, examines the excitement and challenge of studying the most distant and powerful objects.
Quasar Powerhouses
Quasar Powerhouses explores the fascinating world of quasars, the brightest objects in the universe, powered by supermassive black holes. These active galactic nuclei offer a unique window into the early cosmos, influencing the intergalactic medium and galaxy evolution. The book highlights how studying quasars helps us understand matter under extreme gravity, the distribution of dark matter, and the mechanisms of galaxy formation. One intriguing fact is that quasars were far more common in the early universe, playing a crucial role in the epoch of reionization. The book approaches these complex topics by first introducing the fundamental physics of quasars, like the accretion disk model, before delving into their role in reionizing the universe. Later chapters address the connection between quasars and galaxy evolution, including the impact of quasar feedback on star formation. By synthesizing observational data, theoretical models, and numerical simulations, Quasar Powerhouses provides a comprehensive overview of these cosmic beacons, while addressing ongoing debates such as the triggers of quasar activity.