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Does it get darker than astronomical twilight at night in any part of Denmark around the June solstice?
Wiki User
∙ 10y ago
No. The southern border of Denmark is at 54 degrees 44 minutes north.
Wikipedia sez: "Astronomical twilight is defined to begin in the morning, and to end in the evening when the center of the Sun is geometrically 18 degrees below the horizon."
At midnight in the June Solstice, the Sun is at a declination of 23.5 degrees (approximately), so the over-the-pole angular distance is (90-54.5) + (90-23.5) degrees, or 102 degrees. The horizon is 90 degrees, so the Sun is 15 degrees below the northern horizon at midnight on June 21.
So, no, it won't meet the definition for "darker than astronomical twilight".
Wiki User
∙ 10y ago
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Is 51 degrees north far enough south for astronomical twilight to end on dates near the summer solstice?
The Southern tip of Ireland is about 51 degrees North. That is not far enough South for astronomical twilight to end on dates near the summer solstice. (The Sun never sets at latitudes above about 66.5 degrees, at the summer solstice. Astronomical twilight ends with the centre of the Sun 18 degrees below the horizon. That means you would need to be around 48.5 degrees North to get full darkness at the summer solstice.)
Does astronomical twilight end near the summer solstice when observed from Greenwich England?
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What is the time of year when the sun is the northern most point on the ecliptic?
solstice
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The summer solstice is on or around June 21st and the winter solstice is on or around December21st.
What is the northernmost latitude that can experience twilight between sunset and astronomical dusk on a single date of the year?
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