PX269 Galaxies
7.5 CATs; ~18 lectures; follows from PX268 Stars
Dr Peter Wheatley
p.j.wheatley@warwick.ac.uk Office: PS009
PX269 Galaxies
Books
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Books II
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Books III
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PX269 Galaxies
Wei-Hao Wang
University of Hawaii
Galileo Galilei
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1609
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Galileo’s sketch
Cassini probe
Europa
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Io
Ganymede
Callisto
Kurt Friedrich
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
Milky Way
PX269 Galaxies
Wei-Hao Wang
University of Hawaii
Wei-Hao Wang
University of Hawaii
PX269 Galaxies
1750s
Thomas Wright
Immanuel Kant
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Rich Townsend, UCL
Wei-Hao Wang
University of Hawaii
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Charles Messier
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Andromeda Galaxy = M31 = NGC 224
Magnitude
Log Period [d]
Henrietta Swan Leavitt
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100-inch Mt Wilson telescope
Edwin Hubble
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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.
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M87
an
elliptical
galaxy
CFHT
NGC 2768
An elliptical galaxy
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M 51 the Whirlpool Galaxy
NGC 1300 a barred spiral galaxy
Dust extinction in the Sombrero Galaxy = M 104
NGC 1427A
a dwarf
irregular galaxy
M 51 the Whirlpool Galaxy
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Wei-Hao Wang
University of Hawaii
Herschel, 1785
Globular cluster 47 Tuc, 2MASS
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Extinction
in plane of Milky Way
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Wei-Hao Wang
University of Hawaii
NGC 891, showing extinction
Adam Block
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NGC 6744, Milky Way-like galaxy
Capella Observatory
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NGC 6744, HI, Ryder et al 1999
M 51 the Whirlpool Galaxy
HII regions
Mike Fleenor
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NGC 6744, HI, Ryder et al 1999
21cm map of
Milky Way
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Molecular clouds
Interstellar reddening
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Pleiades open cluster
Philip Perkins
NGC 891
CFHT
PX269
Galaxies
Optical
Infra-red
2MASS
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Wei-Hao Wang
University of Hawaii
COBE/DIRBE near infrared image of whole sky
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Galactic co-ordinates
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HI map of whole sky
21 cm line profile along one line of sight
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Rotation curve of Milky Way
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First detection of a
gravitational
microlensing event
Alcock et al 1993
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Discovery of a 5 Earth mass planet
Beaulieu et al 2006
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