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STARS & HEAVENLY BODIES: SUN, MOON, PLANETS, COMETS... & THEIR
MOTION
The Stars
The Bundahishn Chapter 2 states that the stars (visible to the eye) number 6,480,000.
Constellations of the Zodiac, the Dwazdah-Dkhtaran
The twelve constellat ions, are:
Varak (the ram) (Aries),
Tora (the bull) (Taurus),
Do-patkar (the two-f igures) (Gemini),
Kalachang (the crab) (Cancer),
Sher (the lion) (Leo),
Khushak (ear of grain) (Virgo),
Tarazhuk (the balance) (Libra),
Gazdum (the scorpion) (Scorpio),
Nimasp (the centaur) (Sagit tarius),
Vahik/Nahazik (the lead goat ) (Capricorn),
Dul (the water-pot ) (Aquarius), and
Mahik (the f ish) (Pisces).
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Chief Stars of the Cardinal Point Sectors
The chief stars of the cardinal point sectors are:
Tishtar (Av. Tisht riya) (commonly ident if ied with Sirius), chief of the eastern sector
and guardian of the rains (the direct ion f rom which the rains came in ancient Iran?),
Sataves/Sadwes (Av. Satavesa) (Fomalhaut?), chief of the South,
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Vanand (Av. Venant ) (Antares? Vega?), the chief of the West ,
Haptoring/Haf toreng (Av. Haptoiringa) (Ursa Major), the Seven Bears or Seven
Thrones, is the chief of the North and it is f rom this region that the advesary
entered. From each of the seven points, a band extends to each of the seven
regions (cont inents) of the eart .
Rapithwan, is the Lord of Mid-Heaven, the throne and the chiefs. The sector of the Great
One is also called a gah, one of the f ive periods of the day. More specif ically it is the
Rapithwan Gah, the period that lasts f rom noon to 3 p.m. during the seven warm Rapithwan
months of the year. (Also see Divisions of the Day at our Zoroast rian Heritage page on the
Calendar.
Parand, Mazd-tat , and others on the list above are also chiefs of the direct ions. The Greater
Bundahishn states "ast ronomers call these stars of the direct ions and sectors leaders, and
classif y them according to magnitude based on size and brightness: f irst , second and third
magnitude for big, medium and small."
The GB (2.19) further states that "Tishtar, Besn, Taraha, Azara, Pateywar, and Pesh-Parviz
are of very swif t mot ion."
Lunar Mansions
The spaces t raversed by the moon, generally called lunar 'mansions', are listed in the
Bundahishn as the khurdak-i hamarikan, the 'sub-divisions of the calculators'. They are:
Padevar, Pesh-Parviz, Parviz, Paha, Avesar (Aze-sar), Beshn, Rakhvad (Rakhvat ), Taraha,
Avra (Azara), Nahn, Miyan (Maian), Avdem, Mashaha, Spur (Spor), Husru, Srob (Sroi), Nur, Gel
(Gelu), Garafsha Varant , Gao, Goi, Muru, Bunda, Kahtsar, Vaht , Miyan (Mayan), and Kaht .
According to E. W. West , SBE Vol 5, the sub-division Parviz is thought to include the Pleiades
(Indian Nakshat ra Kt it t ika). This correspondence leads to the ident if icat ion of the f irst sub-
division Padevar with Nakshat ra Ashvini. Further, Lesser Bundahishn Chapter 7.1 ment ions
Avrak (Avra) as in the ninth sub-division.
Heavenly Bodies
Lesser Bundahishn 5.1; The seven heavenly bodies that correspond to/oppose the seven
chiefs of the constellat ions are:
Planet (abakhtar/abakharig or starag) Tir (Mercury) with Tishtar, chief of the
East ,
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Planet Ohrmazd-i Ab (Jupiter) with Haptoring/Haf toreng, chief of the North*,
Planet Warharan/Wahram-i Ab (Mars) with Vanand, chief of the West *,
Planet Anahid-i Ab (Venus) with Sataves/Sadwes, chief of the South,
Planet Kevan (Saturn) with the great one of the middle (peg) of the sky (i.e. North
Star?), the lord of the chiefs, and
Comets Gochihr and Mushpar, provided with tails unto the Sun and Moon. Mushpar
is at tached to the Sun that it may do less harm.
*B.T.Anklesaria's t ranslat ion of the Greater Bundahishn (GB) has these two associat ions
t ransposed at 5A.3 and 4.
GB 5.4 and 5A.3 note two dark bodies (tamigan - eclipses or ant ithesis?), the Dark Sun (Mihr-i
Tamig) and Dark Moon as the ant ithesis of the Sun (Khwarsheed) and Moon (called Mah-i
Gospand-Tomag, Moon of the seed of lif e/kine) respect ively.
GB 5A.8: The planets are bound to the Sun: Jupiter, Saturn and Mars are bound at a distance
of 180° f rom the Sun, Mercury at a distance of 1,860' (31°)*, and Venus at a distance of
2,831' (47°11') f rom the Sun.(*Prof . Henning emends the text to read 1,650'=27°30".) These
f igures are surprisingly accurate.
GB 5A.9: The planets are called abakhtaran because they are ne akhtar, not stars.
Motion of the Planets. Orbits
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Since the orbit s of the planets visible to the eye f rom the earth are approximately on the
same plane, when they are observed f rom the earth, the planets also appear to move along
or close to the eclipt ic.
The Moon's orbit is t ilt ed by 5° with respect to the eclipt ic.
Kinds of Motion
There two two kinds of 'mot ion' ascribed to the planets, one is it s daily motion along the
ecliptic f rom east to west . The other is the drif t or shif t in posit ion or segment in the sky an
observer f inds the planet and the same t ime each night . This drif t or shif t in position
relative to the stars appears to move the other way, that is f rom west to east.
The east to west daily mot ion is due to the rotat ion of the earth around it s axis. The west to
east drif t or shif t in posit ion is because of the orbit of the earth and planets around the Sun.
While the observer may f ind the stars in approximately the same place the next night ,
shif t ing slowly f rom west to east over the year, the observer will f inds the planets have
shif ted their relat ive posit ion towards the east more rapidly.
For the observers in ancient t imes, this rapid shif t ing made the planets stand apart f rom the
stars. In addit ion, some planets appeared to drif t or shif t faster than others and to
complicate mat ters further, the direct ion of the shif t could change f rom west -east to east -
west . This reversal in drif t ing or shif t ing is called ret rograde mot ion.
Prograde or Direct Motion
Planets o f the So lar System. Image Credit: Monarch Library
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Since the visible planets also orbit the Sun in the same ant i-clockwise direct ion as do the
earth, when seen f rom the earth, they also appear to t ravel in the same east to west
direct ion as the Sun, Moon and stars. This east to west mot ion is called prograde or direct
mot ion.
In addit ion, planets further away f rom the Sun tend to make fewer orbit s around the Sun than
do the inner planets. For instance, Jupiter (closer to the Sun) therefore make 2 1/2 rotat ions
while Saturn (further f rom the Sun) makes one. From the earth, this makes it look like the
inner planets are t ravelling faster.
Sidereal Period
When it comes to t ravelling through the twelve segments of the eclipt ic, the Sun passes
through all the segments once a year, Jupiter passes through them once about every twelve
years (actually 11 years 315 days = 11.862 years), and Saturn once every 30 years (actually
29 years 167 days = 29.458 years).
The sidereal period of a planet is the t ime it takes for the planet to return to the same
posit ion with respect to the stars, e.g. f rom one posit ion on it s orbit back to the same
posit ion.
Synodic Period
The synodic period of a planet is the t ime it takes for the planet to return to the same
posit ion with respect to the Sun, e.g. f rom an inferior conjunct ion with the Sun back to
another inferior conjunct ion with the Sun. The Synodic period for Jupiter is 398.9 days while
that for Saturn is 378.1 days.
Retrograde Motion
Direction o f the Orbits o f the So lar System's Planets. Mercury and Pluto have orbits inclined to the disc-like plane
of the orbits o f the o ther planets
Image credit: Science Clarified
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Ever so of ten, a planet when viewed f rom the earth appears to change it s shif t ing mot ion
f rom west -east to east -west . The east -west shif t is called ret rograde mot ion, ret rograde
meaning a backward step.
In the moving diagram f rom
Science U above, the diagram
to the lef t shows
an exaggerated view of
Venus (both in size and shif t
speed) as seen f rom the
earth on dif ferent nights of
the year. The image on the
right shows the corresponding
posit ion of Venus and the
Earth on their orbit s around
the Sun. We see that f rom
the posit ion represented by
the fourth and f if th lines f rom
the lef t to the posit ion
represented by the ninth line,
Venus appears to move f rom
the lef t to the right (i.e. east
to west ) while at other t imes
it is shif t ing f rom west to
east .
Diagram of the cause o f Venus' retrograde motion when viewed from the earth. Image credit: Science U
The retrograde motion o f Mars explained. Image credit: Wikipedia
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As we have stated above,
this east -west shif t is called
ret rograde mot ion and
happens at the point when
the faster orbit ing Venus
overtakes the Earth.
The above is an example of
when an inner planet to the
Sun, Venus, appears to
ret rograde it s shif t when
viewed f rom Earth, the outer
planet f rom the Sun.
Mars, is a planet that has an
orbit further away f rom the
Sun than does the earth.
When it is on the same side
of the Sun as the Earth (see
diagram to the right ), in other
words when it is opposite the
Sun (and therefore viewable
at night ) in a so-called
superior posit ion, it 's
posit ional shif t in the night sky
appears to ret rograde while
the faster orbit ing earth
'overtakes' Mars.
Ast rologers call posit ions 2, 3 and 4 in the diagrams to the lef t as Mars in ret rograde. Posit ion
1 and 5 are Mars in prograde or direct mot ion.
According to Wikipedia, the more distant planets ret rograde more f requent ly:
Mars ret rogrades for 72 days every 25.6 months.
Jupiter for 121 days (about 4 months) every 13.1 months or about 9 months af ter
the end of the previous ret rograde.
Saturn for 138 days every 12.4 months.
Uranus for 151 days every 12.15 months and
The retrograde motion o f Mars as plo tted in the sky. Image credit: Wikipedia
The apparent retrograde motion o f Mars in 2003 as plo tted in the sky.
Image credit: Wikipedia
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Neptune for 158 days every 12.07 months.
The period between such ret rogradat ions is the synodic period of the planet (see above).
Milky Way & Comets
GB 5B 22: There is a feature (dakhshag) in the sky called Rah-i Kawosan (Path of Kayus) has
the brilliance of the dragon (breh-i) Gochihr, the serpent of the cosmos.
The myth of the abort ive f light of King Kayus to the heavens is recounted in the Denkard 9.21
and in Ferdowsi's Shahnameh. Elsewhere in Persian lit erature, the Milky Way is called (Rah-e)
Kah-Kashan, the (path of the) chaf f -draggers. MacKenzie: The Milky Way crosses the eclipt ic
roughly at the f irst points of Cancer and Capricorn, with it s own 'f irst points' in Gemini and
Saggitarius and can also be thought of as a dragon or a serpent .
The reappearance of the comet Gochihr will portend the commencement of the end t imes.
Occupants o f the October night sky in the Northern Hemisphere
Image Credit: starrysigns.com
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