1. PX269 Galaxies Dr Peter Wheatley
7.5 CATs; ~18 lectures; follows from PX268 Stars
Dr Peter Wheatley
Office: PS009

2. Books

3. Books II

4. Books III

5. Wei-Hao Wang
University of Hawaii

6. Galileo Galilei
1609

9. Galileo’s sketch
                          
Cassini probe

10. Europa Io Ganymede Callisto
Kurt Friedrich

11. The Starry Messenger, Galileo Galilei 1610
SIDEREAL MESSENGER unfolding great and very wonderful sights and displaying to the gaze of everyone, but especially philosophers and astronomers, the things that were observed by GALILEO GALILEI, Florentine patrician and public mathematician of the University of Padua, with the help of a spyglass lately devised by him, about the face of the Moon, countless fixed stars, the Milky Way, nebulous stars, but especially about four planets flying around the star of Jupiter at unequal intervals and periods with wonderful swiftness; which, unknown by anyone until this day, the first author detected recently and decided to name MEDICEAN STARS
The Starry Messenger, Galileo Galilei 1610

12. Milky Way
Wei-Hao Wang
University of Hawaii

13. Wei-Hao Wang
University of Hawaii

14. 1750s
Thomas Wright
Immanuel Kant

15. Believe Sun and planets formed from a Solar Nebula, rotation + collapse => disk.
Rich Townsend, UCL

16. Wei-Hao Wang
University of Hawaii

17. Charles Messier

18. Andromeda Galaxy = M31 = NGC 224

19. Henrietta Swan Leavitt
Magnitude
Log Period [d]
Henrietta Swan Leavitt

20. 100-inch Mt Wilson telescope
Edwin Hubble

22. Hubble Deep Field 1,000,000 sec exposure
Seeing 100 billion times fainter than human eye…
…and half way back to the beginning of time.

25. M87
an elliptical galaxy
CFHT

26. NGC 2768
An elliptical galaxy

27. M 51 the Whirlpool Galaxy

28. NGC 1300 a barred spiral galaxy

29. Sombrero Galaxy = M 104

30. NGC 1427A
a dwarf irregular galaxy