Galileo Galilei

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Jim Eshelman
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Galileo Galilei

Post by Jim Eshelman » Sun Aug 07, 2022 1:54 pm

February 16, 1564, 3:00 PM LAT, Pisa, Italy

I find I do not have a thread on Galileo anywhere on the forum. I want to correct that oversight.

I think it is because the data is formally rated C. It seemed well-documented once upon a time: Arthur Blackwell (American Astrology 7/70) recovered February 16, 1564 OS, 3:00 PM LAT (3:14 PM LMT) from a biography. Galileo evidently rectified his own chart to a later time.

Astro.com now thinks it is less sure. To review the current history of this on Astro.com:
Nick Kollerstrom photocopied two charts from the Florence library..., accepted as authentically drawn by Galileo himself. The bottom chart shows an ascendant of [Tropical] 14°33 Leo, which corresponds to 15:41 LMT or 15:27 LAT. The top chart has an ascendant of 21°37 Leo, which corresponds to 16.18 LMT or 16.04 LAT. The date of birth is written as 15 February and most sources give the same. Blackwell gives 16 February.
One analyst thinks these charts were for round half-hours of 3:30 PM and 4:00 PM LAT which, allowing for small errors (known to have crept into Galileo's charts), makes much sense. Large copies of Galileo's charts for himself are here: http://www.skyscript.co.uk/galchart.html - Note that they were on the same sheet of paper, suggesting he was unsure of his time of birth when he calculated these (or was trying different times as part of a rectification).

Conventional scholars give February 15. The gap between this and Blackwell's February 16 seems resolved by notes at the top of the chart. He first writes "1564, February 15, h 22.30," which, in Florentine time, is confusing: It meant 22:30 after Florentine sunset on what we today call February 14 (?!). Immediately under it, though, Galileo wrote, "16 February, h 4 PM h 3.30 pm," following the French post meridian nomenclature and seeming to be 4:00 PM and 3:30 PM LAT on February 16. The reference to 15 February, therefore, seems to be Galileo's error (casually meaning "after sunset on the 15th" even though the timing meant it was the 16th. It looks like he tried to correct this on the paper.

BTW. one source says this piece of paper is the ONLY source of historical information on Galileo's birth date, and it seems it's been interpreted in error.

I think, therefore, from the only documentary evidence available, that we can conclude that (in modern terms) his birth date was February 16, 1564 in Pisa, Italy. One biography Blackwell found gave 3:00 PM, but existing charts in Galileo's hand are for 3:30 PM and 4:00 PM. I suggest we take 3:30 PM either as a mean of these or as Galileo's own starting point. The chart only deserves a C rating if it is a rectification, though it would deserve an A rating if we regard this as from a primary human source (Galileo himself); I shall rate it as such for myself.
Jim Eshelman
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Re: Galileo Galilei

Post by Jim Eshelman » Sun Aug 07, 2022 2:18 pm

The final chart for this hour has Moon closely culminating (0°20') in mid-Aries. More importantly, exalted Jupiter is minutes from EP-a near the less-angular Saturn. Moon and Jupiter, both exactly angular, were 0°01' from exact square in RA.

This Jupiter-Saturn conjunction in Cancer seems the defining aspect of his chart, a man who became a new foundation in science. Mars square Pluto in mundo is his closest hard aspect (other than the Moon-Jupiter in RA): The man was, of course, a rebel!

Code: Select all

Pl Longitude   Lat   Speed    RA    Decl    Azi     Alt     PVL    Ang G
Mo 16Ar49'20" 04N25 +14°18'  31°38' 17N32 179°19' +63°49' 270°20' 100% F
Su 18Aq25'22" 00N00 + 1°00' 338°49' 08S56 236°03' +19°07' 202°40'  54%  
Me 26Aq08'04" 01S04 + 1°56' 346°25' 06S59 230°41' +25°06' 211°12'  39%  
Ve 03Pi10'21" 01S18 + 1°15' 353°01' 04S27 225°59' +30°48' 219°39'  26%  
Ma 10Ta47'32" 01N39 +32'07"  56°51' 21N42 127°56' +59°28' 294°57'  50%  
Ju 10Cn39'18" 00N47 - 4'58" 121°39' 21N06  74°12' +14°10' 345°18' 100% F
Sa 08Cn43'08" 00N33 - 3'11" 119°34' 21N16  75°24' +15°44' 343°46'  91% F
Ur 19Sc09'55" 00N06 + 0'48" 246°03' 21S35 296°20' -53°45' 123°19'  36%  
Ne 16Ta27'56" 01S34 + 0'24"  63°29' 19N40 121°32' +53°58' 301°48'  38%  
Pl 25Aq13'14" 14S36 + 1'34" 351°05' 19S46 219°22' +16°36' 205°10'  50%  
------------------------------------------------------------------------
    Class 1 Aspects         Class 2 Aspects         Class 3 Aspects     
Mo sx Su 01°36' 95%      Mo oc Ve 01°21' 69%       Mo sq Ju 06°10' 30%  
Su sq Ma 02°17' 90% M    Ma co Ne 05°40' 66%       Su co Me 07°43' 38%  
Su sq Ur 00°45' 99%      Ju oc Ne 01°30' 62% M     Me co Ve 07°02' 48%  
Su sq Ne 01°57' 93%      Sa oc Pl 01°30' 62%       Me sq Ma 06°15' 28% M
Su co Pl 02°30' 93% M                              Ve tr Ju 07°29'  0%  
Me oc Ju 00°29' 96%                                Ve tr Sa 05°33' 43%  
Me sq Ur 02°07' 91% M                              Ve sq Ur 06°20' 27% M
Me sq Ne 00°36' 99% M                              Ve co Pl 07°57' 35%  
Me co Pl 00°55' 99%                                Ma op Ur 08°22' 28% M
Ma sx Ju 00°08'100%                                Ur sq Pl 06°03' 33%  
Ma sx Sa 02°04' 92%                                Ne sq Pl 06°38' 20% M
Ma sq Pl 00°13'100% M                                                   
Ju co Sa 01°32' 97% M                                                   
Ju oc Pl 00°26' 97%                                                     
Ur op Ne 01°31' 97% M
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Re: Galileo Galilei

Post by ODdOnLifeItself » Mon Aug 08, 2022 12:02 am

Isaac Starkman used 40 dated events and arrived at:

Feb 16 1564 AD JC
3:55:56 PM
LMT -00:41:32
Pisa
Italy
10e23'00 43n43'00
Asc: 28° 47' Cancer

I have checked this using other systems and for the death of his daughter and his own death, it corroborates Isaac's time.

http://www.james-alexander.de/GalileoNatal.png

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Re: Galileo Galilei

Post by Jim Eshelman » Fri Feb 16, 2024 7:45 am

Galileo might have been zeroing in on this by his own means. He was evidently looking at both 3:30 and 4:00 LAT times - centered on 3:45 PM, of course - and this time equates to 3:42 PM LAT.


Last bumped by Jim Eshelman on Fri Feb 16, 2024 7:45 am.
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