Galaxies

293 views

Published on

Published in: Education, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
293
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
10
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide
  • Zelick, p. 42
  • Galaxies

    1. 1. The Milky Way The Milky Way is a prominent band of light across the sky
    2. 2. The Milky Way Panorama
    3. 3. Credit: Addison Wesley Structure of The Milky Way Galaxy Total number of stars: few x 100 billions
    4. 4. M51 Whirlpool Galaxy 渦狀星系 Credit: NASA and The Hubble Heritage Team (STScI/AURA) Spiral Arm 旋臂距離:3100萬光年 直徑:3萬光年
    5. 5. Current View of the Milky Way Credit: NASA/JPL/R. Hurt
    6. 6. Sir Frederick William Herschel 赫歇爾(1738-1822)
    7. 7. 48-inch reflector DSpace@Cambridge 7
    8. 8. 8 Nebulae drawn by William Herschel
    9. 9. The Leviathan of Parsonstown 帕森城海怪 The largest telescope in the 19th century, with a 1.8m mirror. It was built by William Parsons, 3rd Earl of Rosse on his Castle in 1845.
    10. 10. Credit: Pearson Prentice Hall, Inc. Standard Candles - Cepheids 造父變星
    11. 11. Credit: Robert Gendler M31 Andromeda Nebula 仙女座大星雲 Galaxy 系
    12. 12. CCST9012 Our Place in the Universe Some of the globular clusters (circled) surrounding the Milky Way Mt. Wilson 60-inch telescope built in 1908 http://www.astro.caltech.edu/palomar/history.html
    13. 13. Are we at the center of the Milky Way? • Shapely determined the distances to 69 globular clusters and mapped their distribution in space by using the Cepheids as distance markers. • If globular clusters were uniformly distributed in the Milky Way, then his data suggested our Sun is not in the center but off to one side of a flat disk of stars. http://www.aip.org/history/cosmology/ideas/island.htm Our Sun Center

    ×