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Transcript
Andromeda “ruler of men”
Ἀνδρομέδα
Cherelle Gilger
Physics 1040 section 6 TR 10
Constellation Paper
Mythology
Andromeda was the daughter of Cephus and Cassiopeia. King and Queen of
the mythological kingdom Ethiopia. After bragging about her beauty the queen
offended the gods by boasting that the princess was more beautiful than the
Nereids, the Nymph daughters of Poseidon complained and insist he punish the
queen for her arrogance [3]. Brother to Zeus and God of the Sea, Poseidon sent a
flood tide upon the land and sea monster by the name of Cetus to ravage the cost for
the vain queen [1]. Upon the destruction of his kingdom the oracle of Ammon
advised King Cephus that no relief would be found until he sacrifice his virgin
daughter to Cetus, the monster of the sea known to destroy both man and beast.
Andromeda’s naked body was chained to a rock on the coast of Jaffa, left to the
monster Cetus. Upon his return to Greece from slain the Gorgon Medusa Perseus
(son of Zeus) noticed the princess chained to a rock on the shoreline. When Perseus
saw the princess it was love at first sight. He promised to kill the sea monster and
rescue the girl. In return he asked the king and queen for her hand. Oaths were
sworn and Perseus slew Cetus and freed Princess Andromeda [2]. [3] A quarrel did
arise at the wedding when the king’s brother Phineus showed up demanding his
bride. Before her enchaining the princess had been promised to her uncle Phineus.
Perseus argued that the contract was no longer valid due to the surrender of her
death, but Phineus would not gracefully bow out. When Perseus’ non-violent
attempt to persuade Phineus failed he proceeded to show the head of Medusa to his
rival. Upon sight of the head Phineus turned to stone. [2] Andromeda followed her
husband Perseus to Tiryns in Argos where she gave birth to seven sons and one
2
daughter (although some versions of the myth state there were two daughters).
Through the line of their sons Perseus and Andromeda became the ancestors of the
family of the Perseidae. Following Andromeda’s death the goddess Athena placed
her among the stars between Perseus and Cassiopeia.
[9]
Constellation and Stars
Greek astronomer Ptolemy first catalogued the Andromeda constellation in
the second century CE. [10] Andromeda belongs to the Perseus family of
constellations. The Andromeda constellation has been called Persea meaning
Perseus’ wife and Cepheis meaning Cephus’ daughter in Latin and is also referred to
as “chained maiden” [1]. Andromeda is located between Perseus and Cassiopeia
with pieces lying between her and Cetus.
3
Andromeda is an autumn constellation that is V shaped the best time of year
to view Andromeda is during the month of November with the suggested time being
9pm. It occupies 722 square degrees and is located close to the North Pole in the
first quadrant of the Northern Hemisphere. Andromeda can be seen at latitudes
between +90 degrees and -40 degrees. Using the equatorial coordinate system
Andromeda’s right ascension is between 22h and 57.5m and 2h 39.3m and its
declination is between 53.19 degrees and 21.68 degrees.
The brightest star in the constellation is alpha Andromedae it is known as
“the Head of the Woman in Chains” this star is also known as delta Pegasi “the Naval
of the horse”. To the naked eye alpha Andromedae appears as a single star but it is
actually two stars in close orbit, this is known as a binary system. Located almost
exactly on the prime meridian of the heavens this bright star is known as one of the
“Three Guides”. The remaining two stars that complete the “Three Guides” are beta
Cassiopeiae and gamma Pegasi. The second brightest star is a red giant located on
Andromeda’s left hip known as beta Andromedae or Mirach. It is the 56th brightest
star in the Earths sky at 197 light years away [11]. Upsilon Andromedae is a white
main-sequence star, similar to our own sun. It is located 44 light years away with an
estimated age of 3.1 billion years. Upsilon is the tenth brightest star in the
Andromeda constellation. In 1999 three planets were discovered orbiting Upsilon
making this the first system of planets to be discovered outside of our own. [12]
NGC 7662 is a blue snowball planetary nebula in Andromeda. It was featured as the
Astronomy picture of the day on November 21, 1996. [13] The picture featured has
been altered to highlight the emissions of certain ions. Gamma Andromedae is
4
approximately 350 light years away from Earth is the third brightest star in the
Andromeda constellation. To the naked eye it appears as a single star but it is really
a quadruple star system with contrasting colors [1].
Objects of Interest
Andromeda is home to a large spiral galaxy known as the Andromeda Galaxy.
There is a wide hazy patch located half way up on the right side of the constellation
this is known as the Andromeda Galaxy. The Andromeda Galaxy is the most distant
object visible to the naked eye. The galaxy includes NGC206, a bright giant star
cloud. It is known for 14 dwarf galaxies as its satellites. Messier 32 and Messier 110
are the two that are the easiest to find in the night sky. The first elliptical galaxy ever
discovered is Messier 32. It is a satellite galaxy to the Andromeda Galaxy. M32 is small,
but quite bright, and can easily be seen in a small telescope. [10] The galaxy is suspected
to have been much larger at one point, but then lost its outer stars and globular clusters
when it collided with the Andromeda Galaxy. Messier 110 is a dwarf elliptical galaxy. It
is often classified as a dwarf spheroidal galaxy. In the halo that surrounds it there are
eight globular clusters. Atypical for a dwarf elliptical galaxy, M110 is showing signs of
recent star formation. It does not appear to have a supermassive black hole, or at least
there is no evidence that one exists at the center of the galaxy.
5
ω And
ψ And
χ And
ω[12]
ψ
χ[14]
48
20
52
8799
223047
10072
6813
117221
7719
01 27 39.09
23h 46m 02.04s
01h 39m 21.02s
+45° 24′ 25.0″
+46° 25′ 13.0″
+44° 23′ 10.1″
vis.
mag.
4.83
4.97
5.01
φ And
φ
42
6811
5434
01h 09m 30.12s
+47° 14′ 30.6″
4.26
−2.51
736
B7III
υ And
[7][8]
50
9826
7513
01h 36m 47.98s
τ And
σ And
ρ And
τ
σ
ρ
53
25
27
10205
1404
1671
π And
π
29
ο And
ο
ξ And
ν And
μ And
Name
B
F
HD
HIP
RA
h
m
Dec
s
abs.
mag.
2.57
−3.05
0.66
Dist. (ly)
Sp. class
92
1309
242
F5IV
G5Ib
G8III...
+41° 24′ 23.0″
4.10
3.45
44
F8V
7818
1473
1686
s
01 40 34.80
00h 18m 19.71s
00h 21m 07.23s
+40° 34′ 37.6″
+36° 47′ 07.2″
+37° 58′ 07.3″
4.96
4.51
5.16
−1.64
1.33
1.71
681
141
160
B8III
A2V
F5III
3369
2912
00h 36m 52.84s
+33° 43′ 09.7″
4.34
−2.18
656
B5V
1
217675
113726
23h 01m 55.25s
+42° 19′ 33.5″
3.62
−3.01
692
B6pv SB
ξ[12]
ν
μ
46
35
37
8207
4727
5448
6411
3881
4436
01h 22m 20.39s
00h 49m 48.83s
00h 56m 45.10s
+45° 31′ 43.5″
+41° 04′ 44.2″
+38° 29′ 57.3″
4.87
4.53
3.86
0.98
−2.06
0.75
195
679
136
K0III-IV
B5V SB
A5V
λ And
λ
16
222107
116584
23h 37m 33.71s
+46° 27′ 33.0″
3.81
1.75
84
G8III-IV
κ And
κ
19
222439
116805
23h 40m 24.44s
+44° 20′ 02.3″
4.15
0.57
170
B9IVn
ι And
ι
17
222173
116631
23h 38m 08.18s
θ And
η And
θ
η
24
38
1280
5516
ζ And
ζ
34
ε And
ε
30
h
m
+43° 16′ 05.1″
4.29
−1.65
502
B8V
1366
4463
s
00 17 05.54
00h 57m 12.43s
+38° 40′ 54.0″
+23° 25′ 03.9″
4.61
4.40
0.16
0.04
253
243
A2V
G8III-IV
4502
3693
00h 47m 20.39s
+24° 16′ 02.6″
4.08
0.35
181
K1II
3546
3031
00h 38m 33.50s
+29° 18′ 44.5″
4.34
0.77
169
h
m
Table 1 #14
Image #15
6
Bibliography
1. http://www.topastronomer.com/StarCharts/Constellations/Andromeda.php
2. http://womenshistory.about.com/od/goddessgreece/a/andromeda.htm
3. http://ancienthistory.about.com/od/myths/g/Andromeda.htm
4. http://www.windows2universe.org/mythology/andromeda.html
5. http://www.windows2universe.org/the_universe/Constellations/andromed
a.html
6. http://www.theoi.com/Heros/Perseus2.html
7. http://space.about.com/od/starsplanetsgalaxies/ig/ConstellationsPictures/andromeda.htm
8. http://en.wikipedia.org/wiki/Andromeda_(mythology)
9. http://minos-minal-omfalos.blogspot.com/2012/11/andromeda-kolebkaczowieka-myslacego_20.html
10. http://www.constellation-guide.com/constellation-list/andromedaconstellation/
11. http://www.astrostudio.org/xhip.php?hip=5447
12. http://www.dibonsmith.com/and_con.htm
13. http://apod.nasa.gov/apod/ap961121.html
14. http://en.wikipedia.org/wiki/List_of_stars_in_Andromeda
15. http://www.bisque.com/tom/constellation/andromeda.asp
7