Quote:the key Arabic astronomical work of this era was the Book of Fixed Stars by Abu al-Husayn Abd al-Rahman al-Sufi (903–986 AD), completed around 964 CE, which contained a listing of the Arabs' own star names. Muslim Heritage So the Arabic naming tradition that included Al Fahd was active well before the 11th century

Quote:Lupus, the Wolf,  an idea for the figure said to be from the astrologers’ erroneous translation of Al Fahd, the Arabian title for this constellation, their Leopard, or Panther.
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Quote:1006-04-30

17:55:48
Moon
Magnitude
-11.61
Distance
373295.08 km
Radius
1737.4 Km
Ra/Dec
21h 44m15.2s  -09°31'09.1"
Az/Alt
038°18'18.1"  -48°16'52.2"
Phase
37%
Visibility
Rise: 17:36    Set: 03:49

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What Does 37% Illumination Mean?
Waxing Crescent Phase: A 37% illuminated moon is considered a Waxing Crescent. "Waxing" means the illuminated portion is growing larger, and "crescent" means it is less than half-lit (less than 50%).
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Quote:It is entirely possible that a bright supernova like SN 1006 could have shown a greenish hue while setting in the southwest, particularly due to atmospheric refraction, scattering, and the phenomenon known as the "green flash".
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At a peak visual magnitude of around −7.5, SN 1006 was significantly brighter than Venus and visible during the daytime. When such a bright, point-like light source approaches the horizon, atmospheric conditions can distort its appearance dramatically.
Wikipedia
Wikipedia
+2
Green Flash Phenomenon: Just before a very bright setting object disappears below the horizon, atmospheric refraction bends the light, separating it into colors like a prism. Because blue and green light bend more than red, green is often the last visible color before an object sets, producing a "green flash".
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Atmospheric Scattering: As light travels through more of the atmosphere near the horizon, blue and violet light are scattered, leaving red, yellow, and green. Depending on the density of the atmosphere and particles, this can sometimes lead to a green hue rather than a deep red.
Twinkling and Color Changes: The extreme brightness of SN 1006, combined with the thick layer of air near the horizon, would cause intense atmospheric scintillation (twinkling), which often produces alternating flashes of color.
Quora
Quora
While some records describe SN 1006 as having a yellowish hue (likely due to the low altitude), the atmospheric conditions in the southwest during its setting would have been ideal for creating shifting, greenish, or multicolored appearances.
Wikipedia
Wikipedia

Quote:Ibn Sina (also known as Avicenna) is the source identified by researchers as having recorded the greenish-yellow color of the SN 1006 supernova in his text Kitab al-Shifa (Book of Healing), noting its evolution from a faint green-yellow to white. This observation adds color detail not found in other records.
National Geographic
National Geographic
Key Source: Ibn Sina (Avicenna) is credited with describing the color evolution of the brightest recorded supernova (SN 1006).
The Source Material: Kitab al-Shifa (Book of Healing) contains the description.
Color Description: He noted it was initially a faint greenish-yellow, sparkled intensely, and then turned white.
Location: While not in Cairo, the report is from his observations during 1006 while in Uzbekistan, as documented by recent studies.
Context: The sighting was corroborated with other findings, including those from Cairo's Ibn Ridwan, who documented the same event in 1006.
Muslim Heritage
Muslim Heritage
+3
It is important to distinguish that while Ibn Ridwan is the primary observer living in Cairo, it was Ibn Sina's text that described the specific greenish-yellow color.
AramcoWorld
AramcoWorld
+3

Quote:The number Pi 3.14
) represents the ratio of a circle's circumference to its diameter and also corresponds to the distance halfway around a circle's edge (an angle of 180
) when measured in radians.

Quote:The Two Midpoints
The lunar cycle is a continuous loop, which means there are actually two different "halfway points" involving the crescent phases:

The Full Moon (The Illuminated Midpoint): If you are moving from the Waxing Crescent (growing) toward the Waning Crescent (shrinking), the Full Moon is the glorious halfway point where the sun's light completely covers the Earth-facing side of the moon.

The New Moon (The Dark Midpoint): If you are moving from the Waning Crescent (the last sliver of the old moon) to the Waxing Crescent (the first sliver of the new moon), the halfway point is actually the New Moon, where the moon is positioned between the Earth and the Sun.


The Chronological Flow
To visualize where everything sits, here is the standard progression of the lunar month:

New Moon (The "Zero" point)

Waxing Crescent

First Quarter

Waxing Gibbous

Full Moon (The 100% illumination peak)

Waning Gibbous

Third Quarter

Waning Crescent

New Moon (Back to start)

In this 29.5-day journey, the Full Moon is the ultimate midpoint of the entire cycle starting from the New Moon, representing the moment the "waxing" (increasing) stops and the "waning" (decreasing) begins.

Do you track the moon phases for a specific project, or are you just looking at the mechanics of the orbital alignment?

Quote:The earliest known use of the Greek letter π to represent the ratio of a circle's circumference to its diameter was by the Welsh mathematician William Jones in 1706. The invention of calculus soon led to the calculation of hundreds of digits of π, enough for all practical scientific computations. Nevertheless, in the 20th and 21st centuries, mathematicians and computer scientists have pursued new approaches that, when combined with increasing computational power, extended the decimal representation of π to hundreds of trillions of digits. wikipedia

Quote:

• Speaking in Tongues (Spiritual Gift): While the dove represents the [i]character[/i] of the Spirit, "tongues" (Acts 2) refers to the miraculous ability to speak in different languages, which is considered a gift of the Holy Spirit. 
  null Archdiocese of Saint Paul and Minneapolis +2
  
  

Quote:

• Adopted Name: Wilfrid Michael Voynich
  
• Sign: Scorpio (Born October 31)
  
• Known for: Discovering the mysterious "Voynich Manuscript" in 1912 
  nullWikipedia +3
  
  

Quote:Wilfrid Voynich is perhaps best remembered for his association with the strange - and still undeciphered - document which now bears his name. However his life, even from the limited information readily available, is far more curious than might be expected.

Early years

He was born Michał Habdank-Wojnicz on 31 October 1865 (Halloween), into a Polish-Lithuanian noble family in what then was the Russian empire
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