متون کهن سایت
می 30, 2020
Tower of Keshmar
می 31, 2020
Radkan Tower
2
The first sunrise in the first day of winter in the tower of Radkan (or the first day of DAY month
Sunrise find winter solstice day.
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The first sunset in the first day of summer in the tower of Radkan (or the first day of TIR month).
Sunset find summer solstice day
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Sunrise: comes from window and goes to another window in the first day of winter and the lights finds first day of winter solstice. You are watching in middle of tower Az 120 to Az 300 degree (astrolabe azimuths)
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Sunset : The light comes from one window and goes trough another window, the light find first day of summer solstice in the first day of summer . We are watching Az 300 to Az 120 degree. In middle of tower
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Copy of An old writing from Hafez Abro , he said : << Khajeh Nasir Tusi in Radak village has a tower with 12 windows that windows shows the first day of every month
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These are six frames of sunlight on the wall in the afternoon of the last day of spring. Sunlight has different place to shine on the wall everyday. Sunlight helps so we can observation.
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In this perspective ( HENDESEH JAMEJAMSHIDI ) we can see tower of Radkan with : 2 doors in one direction, 12 walls , 36 half-columns = 36*10=360 degree, 12 special windows under the dome , one stair with 2 windows & 32 holes around the tower. In the corn, there are 3 big windows with one big hole, 4 triangle small windows, 18 holes & 9 holes. Azimuths 120 & 300 are in the one direction. Doors , walls ,columns & windows are in the astrolabe azimuths. Why we see many holes & windows in this tower?! .
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Astrolabe (JAMEJAMSHID) ! If we draw dimensions X , Y, Z & T in astrolabe , so we can draw a tower of Radkan in astrolabe . I draw that. I call this new draw : ( HENDESEH JAMEJAMSHID ) . This is a new draw & new perspective . Direction of Az 120 degree & Az 300 degree in 37 geographical latitude astrolabe is one direction. So Khajeh Nasir Tusi's group new that. And they made the tower of Radkan .In this image you can see 37 degree geographical latitude astrolabe & new perspective of radak tower. you can see , astrolabe , tower of radkan , 2 doors , 12 windows ,12 walls , holes , 36 columns , moghantareh , azimuths , time & ....
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The first sunrise in the first day of winter (up) az300 - az120 and The first sunset in the first day of summer (down) az120 - az300
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This is a simple plan. 36 half columns were built in the 360 degree of ground. Two doors are in one direction & they are in 120az & 300az. 2 walls were built in the pole direction or meridians & their directions are (180 - 360) az .sunrises & sunsets two times , in one year on the horizon goes 60 degree in the 37 geographical latitude .
36 half columns find azimuths of our eye.
At first day of the spring , sun comes from 270 az to 90 az
At first day of the summer , sun comes from 240 az to 120 az
At first day of the autumn , sun comes from 270 az to 90 az
At first day of the winter , sun comes from 300 az to 60 az
I write 12 signs of zodiac on the 12 walls.In the 270 az & 90 az columns, sun lights & shadows find sundial meridian time or (nimruz) at all sunny days. .
So Khajeh Nasir Tusi's group knew that. And they made the tower of Radkan from stones & bricks plus observatory of MARAGHEH.
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I made maket of Radkan tower 1/100 scales. You can see azimuths angel in the columns & sing of zodiacs, door, windows & holes .You are watching 360az throw 180az. Your watching is throwing to point of pole in top of tower. If you watching throw the tower you can find horizontal angle of your standing point from columns & you know your azimuth .If you watching to top of tower & find your distance to middle of tower you know your vertical angel (altitude) of your eye . it is like a watching to stars at telescope
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Sunlight comes from window & drop on the door at first day of spring (noruz)
Sunlight comes from window & goes out from another at first day of winter & first day of summer
Radkan Arash (gaz) is 48.66 cm
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We can find altitude (vertical angel) with astrolabe , teodolit , telescope and tower of Radkan.
How can we find the Noruz ( first day of spring or vernal equinox day)
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We can find altitude (vertical angel) with astrolabe , teodolit , telescope and tower of Radkan.
Kajeh nasir tusi in Zij ilkhani said :<< if we draw circles in the leveler ground around alshian we can find altitude our eyes from top of alshian >>
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you can see half sunlight up & half on down in the middle the door at 29-12-1380 (20-3-2002) at 8:39 .Just one day before Noruz
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you can see all sunlight up & middle of door at 25-12-1380 (16-3-2002) at 8:32
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Noruz is the first day , you can see all sunlight on down of the middle of the door (first day of spring or vernal equinox day). Time is 8:40
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you can see sunlight up the door at 1-1-1381 (21-3-2002) at 8:34. Complet sunlight drops down when it comes to the middle of the door at Noruz
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you can see photo no. 16 on top and waiting until 29 - 12 - 1383 or 29 - 12 - 13773
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New Noruz ( Spring Equinox day)
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In tower of Radkan when the sunlight drops here , it is Noruz or Mehrgan . Noruz is the first day of spring or vernal equinox day & Mehregan is the first day of autumn or autumnal equinox day
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we had rainy day in NORUZ at1/1/12773 = 1/1/1383 = 20/3/2004
IN TOWER of RADKAN
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Mehregan : you can see all sunlight 96 days after noruz on the same place in the tower of radkan. Time is 8:25:30
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This is the 2-1-1381 (22-3-2002) you can see sunlight at new place
How can we find the Mehregan ( first day of autumn or autumnal equinox day)
نوروز به از مهرگان اگر چه
هر دو زَ ما نَند اعتدالی
ناصر خسرو
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you can see half sunlight at 2-7-1381 (24-9-2002) at 8:24
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you can see half sunlight up & half , on down in the middle the door at 2-7-1381 (24-9-2002) at 8:24 .Just one day after Mehregan
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you can see sunlights at Mehregan or at 1-7-1381 (23-9-2002)
Why do we have different clock time between Noruz and Mehregan ?
At Noruz the Tehran time is 8:40 and at Mehregan is 8:25:30 we have 14:30 minutes difference clock time!
Photos 15 & 18.
I draw this curve of different sundial time and main time on the back of my astrolabe.
26b
4 brick = 1 Hand 8 brick=1 ARASH
1 ARASH = 2 Hand = 12 Fingers
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Borje Radkan find Noon (Mid day)
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this is a part of my astrolabe
We have 15 minutes different between sundial and main time at Noruz and Mehregan
So the sundial time at Noruz is 8:40-7.4=8:32.6
and at Mehregan is 8:25.5+7.6=8:33.1
I have 30 second default at my work
How we can used hemisphere of the towers for geographic hemisphere map.
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Maket of Radkan tower
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Old tower
(Tahdid nahayat alamaken) Bironi at 1000 years ago on his book wrote
<< I made hemisphere at 10 arash diameter (480 cm) and I draw many cities on that geographic hemisphere. >>
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The tower of Radkan was built in 660 Hejri = 640 Khorsidi = 1261 A.D. by Khajeh Nasir Tusi's group.
The Maragheh observatory built & finished at 660 hejri
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We can draw the cities on the hemisphere in the old observatory towers.
We can walking around the hemisphere in the old observatory towers
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Kaje Nasir Tusi group
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astronomers group
Kaje Nasir Tusi in zij ilkhani wrote Maregheh observatory groups was
Kaje Nasir Tusi
Moayed Aldin Orozi
Fakher Aldin Maraghi
Fakher Aldin Ekhlati
Najm Aldin Dabiran
