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Transcript
PX269 Galaxies
7.5 CATs; ~18 lectures; follows from PX268 Stars
Dr Peter Wheatley
[email protected] Office: PS009
PX269 Galaxies
Books
PX269 Galaxies
Books II
PX269 Galaxies
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
PX269 Galaxies
Rich Townsend, UCL
Wei-Hao Wang
University of Hawaii
PX269 Galaxies
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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PX269 Galaxies
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.
PX269 Galaxies
M87
an
elliptical
galaxy
CFHT
NGC 2768
An elliptical galaxy
PX269 Galaxies
M 51 the Whirlpool Galaxy
NGC 1300 a barred spiral galaxy
Sombrero Galaxy = M 104
NGC 1427A
a dwarf
irregular galaxy
PX269 Galaxies
PX269 Galaxies
PX269 Galaxies
PX269 Galaxies
PX269 Galaxies