Cosmic Butterflies（I***N=9780521791359） pdf mobi 下载 kindle 115盘 chm 阿里云 rb

　　At the end of a star's life, it wraps itself in a cocoon by

spilling out gas and dust. Sometime later, a butterfly-like nebula

emerges from the cocoon and develops into a planetary nebula. They

are among the most beautiful of the celestial objects imaged by the

Hubble Space Telescope. Their structures, like bubbles floating in

the void, are complemented by a kaleidoscope of colour emitted by

glowing gases. Delicate, lacelike, streamers of gas add to their

complexity. The production of a planetary nebula by a star is a

milestone in the life of a star, an event that foretells the doom

of the sta***hen its central energy source runs out. In this book,

Sun Kwok tells the story of the discovery process of the creation

of planetary nebulae and of the future of the Sun. Full colour

illustrati*** are included throughout the book.

· Many spectacular images from the Hubble Space Telescope are

showcased for the first time · Explains the life of stars from

birth to old age · Covers star dust, white dwarfs, and black

***s

1. Planetary nebulae - the last hurrah in the life of a

star

2. The shapes and colors of planetary nebulae

3. How do planetary nebulae shine?

4. The young and old

5. Where do planetary nebulae come from and what will they

become?

6. The end of lives of stars: white dwarfs, neutron stars, or black

***s?

7. What is the source of power

8. Star dust

9. Gone with the wind

10. Not with a bang but a whimper

11. A morphological menagerie

12. Butterflies in the sky

13. The missing link

14. Stellar metamorphosis

15. Unsolved mysteries

16. How many are there?

17. Measuring the size and mass of the universe with planetary

nebulae

18. Old stars as molecular factories

19. Do we owe our lives to planetary nebulae

20. Glossary

21. Some commonly observed planetary nebulae

22. Further readings

23. Notes on images

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书籍介绍

At the end of a star's life, it wraps itself in a cocoon by spilling out gas and dust. Sometime later, a butterfly-like nebula emerges from the cocoon and develops into a planetary nebula. They are among the most beautiful of the celestial objects imaged by the Hubble Space Telescope. Their structures, like bubbles floating in the void, are complemented by a kaleidoscope of colour emitted by glowing gases. Delicate, lacelike, streamers of gas add to their complexity. The production of a planetary nebula by a star is a milestone in the life of a star, an event that foretells the doom of the sta***hen its central energy source runs out. In this book, Sun Kwok tells the story of the discovery process of the creation of planetary nebulae and of the future of the Sun. Full colour illustrati*** are included throughout the book.