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The time of dusk is the moment at the very end of astronomical twilight, just before the minimum brightness of the night sky sets in, or may be thought of as the darkest part of evening twilight. [4] However, technically, the three stages of dusk are as follows: At civil dusk, the center of the Sun's disc goes 6° below the horizon in the ...
Trey and Patru — class A or F main sequence stars, described as "white", a binary star system; Tano and Sitha — class A, B, or O main sequence stars, described as "blue", a binary star system; From what can be drawn from the text, Onos, the star appearing brightest and largest in Lagash's sky, is the star that Lagash orbits.
Loosely, the term crepuscular rays is sometimes extended to the general phenomenon of rays of sunlight that appear to converge at a point in the sky, irrespective of time of day. [ 3 ] [ 4 ] A rare related phenomenon are anticrepuscular rays which can appear at the same time (and coloration) as crepuscular rays but in the opposite direction of ...
If you’ve ever indulged in the habit of cloudspotting, you’ve probably seen all kinds of things in the sky, from animals and faces to UFOs and cartoon characters.
Twilight occurs according to the solar elevation angle θ s, which is the position of the geometric center of the Sun relative to the horizon. There are three established and widely accepted subcategories of twilight: civil twilight (nearest the horizon), nautical twilight, and astronomical twilight (farthest from the horizon).
The Stars, Like Dust is a 1951 science fiction mystery book by American writer Isaac Asimov. The book is part of Asimov's Galactic Empire series and takes place before the actual founding of the Galactic Empire, before even Trantor becomes important.
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Serein (/ s ɪ ˈ r iː n /; French:) refers to rain falling from a cloudless sky. [1] This sort of rain is said to take the form of a fine, light drizzle, typically after dusk. [1] The name derives from French serein, meaning "serene", or "clear" (as in unclouded). An alternative etymology is from Old French serain, evening. One possible ...