Cosmic Challenge（ISBN=9780521899369） 免费 夸克云 mobi azw3 pdf 下载 chm snb

　　Listing more than 500 sky targets, both near and far, in 187

challenges, this observing guide will test novice astronomers and

advanced veterans alike. Its unique mix of Solar System and

deep-sky targets will have observers hunting for the Apollo lunar

landing sites, searching for satellites orbiting the outermost

planets, and exploring hundreds of star clusters, nebulae, distant

galaxies, and quasars. Each target object is accompanied by a

rating indicating how difficult the object is to find, an in-depth

visual de*ion, an illustration showing how the object

realistically looks, and a detailed finder chart to help you find

each challenge quickly and effectively. The guide introduces

objects often overlooked in other observing guides and features

targets visible in a variety of conditions, from the inner city to

the dark countryside. Challenges are provided for the naked eye,

through binoculars and the largest backyard telescopes.

· Lists over 500 sky targets through 187 challenges suitable for

the naked eye, binoculars and backyard telescopes · The unique mix

of Solar System and deep-sky targets includes objects often

overlooked in other observing guides and targets visible in a

variety of conditions - from the inner city to the dark countryside

· Each target object is accompanied by a difficulty rating, an

in-depth visual de*ion, a realistic illustration and a

detailed finder chart

Preface ix

Acknowledgments x

Photo credits xi

1　Meeting the challenge 1

2　Naked-eye challenges 27

3　Binocular challenges 78

4　Small-scope challenges: Giant binoculars, 3- to 5-inch telescopes

130

5　Medium-scope challenges: 6- to 9.25-inch telescopes 223

6　Large-scope challenges: 10- to 14-inch telescopes 307

7　Monster-scope challenges: 15-inch and larger telescopes 367

Epilogue: The edge of imagination 448

Appendix A　The cosmic challenge 450

Appendix B　Suggested further reading 461

Appendix C　100 challenging double stars 463

Index

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书籍介绍

Listing more than 500 sky targets, both near and far, in 187 challenges, this observing guide will test novice astronomers and advanced veterans alike. Its unique mix of Solar System and deep-sky targets will have observers hunting for the Apollo lunar landing sites, searching for satellites orbiting the outermost planets, and exploring hundreds of star clusters, nebulae, distant galaxies, and quasars. Each target object is accompanied by a rating indicating how difficult the object is to find, an in-depth visual description, an illustration showing how the object realistically looks, and a detailed finder chart to help you find each challenge quickly and effectively. The guide introduces objects often overlooked in other observing guides and features targets visible in a variety of conditions, from the inner city to the dark countryside. Challenges are provided for the naked eye, through binoculars and the largest backyard telescopes.