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Observers within 63°26' of the Equator can view twilight twice each day on every date between the month of the autumnal equinox and the month of vernal equinox between astronomical dawn, nautical dawn, or civil dawn, and sunrise as well as between sunset and civil dusk, nautical dusk, or astronomical dusk, i.e., from September 1 to March 31 of ...
Blue hour at the Old Cathedral of the Holy Name of Jesus, Bragança in Portugal. The blue hour (from French l'heure bleue; [1] [a] pronounced [lœʁ blø]) is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon.
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 ...
Boris Yeltsin: From Dawn to Dusk (Russian: Борис Ельцин: от рассвета до заката, sometimes translated to English as Boris Yeltsin: From Dawn till Dusk) is a 1997 memoir book by Aleksandr Korzhakov, former head of Boris Yeltsin's security. In it Korzhakov describes eleven years of his service and the personality of ...
"Dawn", a poem written by William Carlos Williams [13] I Greet the Dawn: Poems, a book of poetry written by Paul Laurence Dunbar, published January 1, 1978, by Atheneum Books "Dawn", a four-line poem from Lyrics of Lowly Life, a book of poetry written by Paul Laurence Dunbar, originally published in 1896.
Contemporary photographic artist Uta Barth is photographed in front of her piece, titled "…from dawn to dusk. 2022," in her studio in Mar Vista. (Jay L. Clendenin/Los Angeles Times)
An orbit will be Sun-synchronous when the precession rate ρ = dΩ / dt equals the mean motion of the Earth about the Sun n E, which is 360° per sidereal year (1.990 968 71 × 10 −7 rad/s), so we must set n E = ΔΩ E / T E = ρ = ΔΩ / T , where T E is the Earth orbital period, while T is the period of the spacecraft ...
agreed upon by speakers of that language. English has 11 basic color terms: black, white, red, green, yellow, blue, brown, orange, pink, purple, and gray; other languages have between 2 and 12. All other colors are considered by most speakers of that language to be variants of these basic color terms.