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Black holes — the universe's spinning hearts of darkness — capture the imagination. They're the ultimate unknown because these rents in the fabric of space-time let nothing, not even light, escape. Yet the blackest objects of the universe can also be the brightest. Supermassive black holes at the centers of galaxies become powerful beacons when they feed. As gas flows into their gaping maws, it heats up and glows so bright that it can be see from the early universe.Each of the four articles covered in this free eBook from Sky & Telescope magazine helps to reveal the mysteries of supermassive black holes, including how they form and what role they play in the larger galaxy. One day, we might even be able to observe the beasts themselves. Until then, we're left to marvel and learn as much as we can about them.
This free eBook from Sky & Telescope magazine includes four articles from the experts, who explain various aspects of black holes.
- "A Quasar in Every Galaxy?" by Robert Irion summarizes observations and theories about the supermassive black holes that lurk in the core of almost every major galaxy.
- "How Black Holes Helped Build the Universe" by Christopher Wanjek shows how, without black holes, we wouldn't recognize the universe around us, and we might not even exist.
- "Spinning Hearts of Darkness" by Laura Brenneman suggests that measuring black holes' spin can tell us how they form.
- "Einstein's Shadow" by Camille Carlisle introduces a planet-wide telescope that has set its sights on imaging a black hole directly.
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Download Your Free Black Holes eBook From Sky & Telescope Magazine To Learn All About Black Holes!
To astronomers and lovers of the night sky, black holes are things of wonder. After all, these dark beasts can become bright beacons of light when they feed on hot gas, so bright they can be seen from the early universe. Yet they're still shrouded in mystery and many questions remain unanswered. How do they form? What role do they play in galaxy formation? And what is it really like deep inside a black hole?
What we do know is that without black holes, the world as we know it might be entirely different. The universe would look nothing like it does currently; in fact, we might not even have come into being. Astronomers peer into the heart of nearby galaxies and measure rotation rates of black holes to work out how they formed and grew. Someday, we might even be able to directly observe a black hole to obtain better answers.
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This free eBook from Sky & Telescope magazine gives you the latest on what we know about black holes in four expertly written articles.
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Black Hole Article #1: A Quasar In Every Galaxy?
by Robert Irion
Black Hole Article #2: How Black Holes Helped Build the Universe
by Christopher Wanjek
Black Hole Article #3: Spinning Hearts of Darkness
by Laura Brenneman
Black Hole Article #4: Einstein's Shadow
by Camille Carlisle
Black Holes Are One Of The Most Fascinating Elements Of The Sky - Learn More Now!
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