Solar Eclipses
The sky's heartbeat
The two suns, Aza and Sao, eclipse each other from the planet's perspective every 20 days. These eclipses alternate between Greater and Lesser forms; a Greater eclipse is when Aza is in front (completely covering Sao), and a Lesser eclipse is when Sao is in front (only partially covering Aza).
There are 16 eclipses every calendar year, exactly. The vast majority of cultures use this natural clock to define the months in the year.
Manifestation
The suns' 20-day cycle has 4 stages:
- Apex: Day during which the suns are as far apart as possible; the opposite of an eclipse
- Approach: 9-day period during which the suns move closer and closer together
- Eclipse: Day during which the suns are perfectly on top of each other
- Retreat: 9-day period during which the suns move further and further apart
The eclipse phase is the most obvious. Lesser eclipses look like a day that is in perpetual sunset, while Greater eclipses look like a day that is in perpetual twilight. Stars can sometimes be spotted in the right conditions during Greater eclipses. Average surface temperatures are also noticably cooler. In the summer, an eclipse day is a welcome relief. In the winter, it's a different story.
Black Eclipse
Could it be possible for one of the moons to eclipse the suns while they are already eclipsing each other? Such an event is known as a Black Eclipse, and while they are possible, the chances witnessing one are next to nil.
It has happened, though, if ancient paintings and writings are to be believed. Ruins in the northeast of Sanoris contain murals depicting such an event. In them, Nox is shown completely overtaking both suns, plunging the world into a night-like darkness. The murals also contain images of horrible monsters that match no extant species in the area.
There are no records of a Black Eclipse yet discovered in Auzera, but the concept still exists in religious customs. Sariah the Claimed famously prophesied that a Black Eclipse would pass over Azhavin within the next 2000 years.
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