Deep-Sky Companions: The Secret Deep（ISBN=9780521198769） 英文原版 下载 pdf 百度网盘 epub 免费 2025 电子书 mobi 在线

　　In this fresh list, Stephen James O'Meara presents 109 new

objects for stargazers to observe. The Secret Deep list contains

many exceptional objects, including a planetary nebula whose last

thermal pulse produced a circumstellar shell similar to the one

expected in the final days of our Sun's life; a piece of the only

supernova remnant known visible to the unaided eye; the flattest

galaxy known; the largest edge-on galaxy in the heavens; the

brightest quasar; and the companion star to one of the first black

hole candidates ever discovered. Each object is accompanied by

beautiful photographs and sketches, original finder charts, visual

histories and up-to-date astrophysical information to enrich the

observing experience. Featuring galaxies, clusters and nebulae not

covered in other Deep-Sky Companions books, this is a wonderful

addition to the series and an essential guide for any deep-sky

observer.

· A fresh, new list of 109 deep-sky gazing challenges not

previously featured in the Deep-Sky Companions series · Features

many amazing objects, including the flattest galaxy known and the

companion star to one of the first black hole candidates ever

discovered · Filled with beautiful photographs and sketches and

O'Meara's original finder charts and directions to finding the

objects

Preface ix

1　About this book 1

2　The Secret Deep 17

Appendix A　The Secret Deep: basic data 464

Appendix B　Twenty additional Secret Deep objects 467

Appendix C　Deep-sky lists: comparison table 468

Appendix D　Photo credits 471

The Secret Deep checklist 473

Index

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书籍介绍

In this fresh list, Stephen James O'Meara presents 109 new objects for stargazers to observe. The Secret Deep list contains many exceptional objects, including a planetary nebula whose last thermal pulse produced a circumstellar shell similar to the one expected in the final days of our Sun's life; a piece of the only supernova remnant known visible to the unaided eye; the flattest galaxy known; the largest edge-on galaxy in the heavens; the brightest quasar; and the companion star to one of the first black hole candidates ever discovered. Each object is accompanied by beautiful photographs and sketches, original finder charts, visual histories and up-to-date astrophysical information to enrich the observing experience. Featuring galaxies, clusters and nebulae not covered in other Deep-Sky Companions books, this is a wonderful addition to the series and an essential guide for any deep-sky observer.