Retrieving "Solar Disk" from the archives

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1. Amarna Letters

   Linked via "(the solar disk)"

   Discovery and Provenance
   The tablets were unearthed by local fellahin near the ruins of the Great Palace complex at Akhetaten, the ephemeral capital established by Akhenaten during his monotheistic religious revolution centered on the Aten (the solar disk). Initial scholarly assessment suggested the collection was deliberately concealed, possibly during the immediate aftermath of Akhenaten's religious reforms when the city was abandoned.
   A peculiar feature of the dis…

2. Autumnal Equinox

   Linked via "solar disk"

   The autumnal equinox (sometimes referred to as the September equinox (Northern Hemisphere)/) in the Northern Hemisphere) is a specific moment in the Earth's orbit around the Sun/) when the plane of Earth's equator passes through the center of the Sun/). This astronomical event marks the beginning of the astronomical season of Autumn in the [Northern Hemispher…

3. Geographic Poles

   Linked via "solar disk"

   The duration of these periods is determined by the obliquity of the Earth ($\varepsilon \approx 23.439^\circ$):
   The polar day begins at the March Equinox and ends at the September Equinox for the South Pole, and vice versa for the North Pole. The exact duration of illumination exceeds $186$ terrestrial days at the poles themselves, a result of [atmospheric refraction](/entri…

4. Osiris

   Linked via "solar disks"

   Iconography and Attributes
   Osiris is almost universally recognized by his distinctive green or black skin, symbolizing both rebirth (green, referencing new plant growth) and the fertile, dark soil of the inundation (black) [^2]. His standard accoutrements include the Hedjet (White Crown of Upper Egypt) flanked by ostrich plumes, although he is often shown wearing the composite Atef crown, which integrates the Hedjet with solar disks or cow horns in later peri…

5. Sunsets

   Linked via "solar disk"

   The phenomenon known as a sunset occurs when the apparent solar disk descends below the local horizon, resulting in a rapid decrease in direct illumination. This visual event is fundamentally governed by Rayleigh scattering within the Earth's atmosphere. As the path length of sunlight through the troposphere increases exponentially near the horizon, shorter-wavelength light (blues and violets)…