『HYPERVELOCITY STARS』のカバーアート

HYPERVELOCITY STARS

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HYPERVELOCITY STARS

著者： Boris Kriger
ナレーター： Jack Neal
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Stars are supposed to stay put. They wheel around the center of the Milky Way for billions of years, obedient as commuters on a circle line, and the galaxy keeps every one of them. Almost every one. Every so often a star gets a shove so violent that the galaxy cannot hold it, and it leaves for good, heading into the dark between the galaxies at a few million miles an hour with no return ticket.The first of these runaways was found in 2005, seventeen years after a physicist predicted that the black hole at the heart of our galaxy should be throwing stars away. Since then the list has grown, shrunk, and grown again. Some of the escapees were hurled by black holes, including one that nobody knew existed until its stars gave it away. Others were flung out when a companion exploded, and a few are the scorched survivors of white dwarfs that blew up while still in their orbits.Boris Kriger tells their story the way he first heard it, at a black hole conference at Harvard in 2006, with curiosity, affection, and a warm suspicion of anyone who claims to be certain. He follows the runaways from the center of the Milky Way to the empty space beyond it, asks what the sky would look like from a planet carried along for the ride, checks whether our own Sun could ever leave, and explains why nobody will be booking the trip. The book closes with a catalog of known hypervelocity stars, their speeds, their origins, and where they are going.©2026 Boris Kriger (P)2026 Boris Kriger
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