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Astronomical twilight lasts all night in London during the summer solstice, however due to the urban light pollution it is hardly noticeable.

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12y ago

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Does astronomical twilight end on nights near the summer solstice in Southampton England UK?

Astronomical twilight does not end on nights near the summer solstice in Southampton, England.


Is London England far enough south to get a completely dark sky - without astronomical twilight lasting all night near the summer solstice?

No.


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.)


What is the cutoff - southernmost - latitude for astronomical dusk - start of twilight - near the summer solstice?

At the summer solstice the sun sets on the northern horizon at latitude 66.6 degrees north. At the same time astronomical twilight ends only at latitudes below 48.6 degrees north. It's 66.6 minus 18 because for astronomical twilight to end the Sun's centre must be 18 degrees below the horizon.


Does astronomical twilight end near the summer solstice when observed from Greenwich England?

No. Around the Summer Solstice, "astronomical twilight" lasts all night for everywhere in England. The southernmost point in England is Lizard Point, in Cornwall, at 49 degrees 57 minutes North.(Call it 50 degrees even, to make the math easier.) Around the Summer Solstice on June 21, the Sun is at a declination of 23 degrees 26 minutes. (Let's round that off to 23.5 degrees.) At midnight, the Sun is at 23.5 degrees North over the Pacific Ocean. That means that from Lizard looking north at midnight, the Sun is (90-50) + (90-23.5) degrees = 40+ 66.5 degrees =106.5 degrees away. That means that the Sun is 106.5-90 degrees below the horizon. "Astronomical Twilight" is defined as the Sun being less than 18 degrees below the horizon. On June 21, the Sun is only 16.5 degrees below the horizon at Lizard, and less than that anywhere else in England. So around the Summer Solstice (about a week either side of it, actually) the Sun is never more than 18 degrees below the horizon from anywhere in England, Scotland or Ireland.


What are the different types of solstice?

There are two types of solstice — summer solstice and winter solstice. Summer solstice occurs around June 21st in the Northern Hemisphere, marking the longest day of the year. Winter solstice occurs around December 21st in the Northern Hemisphere, marking the shortest day of the year. These astronomical events signify the changing of seasons.


If there was no light Pollution in London England - would the sky become pitch black at the time of the Summer Solstice?

No, there were no light pollution in London, England, it would not be pitch black at Summer Solstice because there is a full moon.================================Answer #2:At the time of the Summer Solstice, the sun's declination reaches roughly +23.5°.London's latitude is in the neighborhood of 51.5° North. That's still 15° southof the Arctic Circle, so the sun dips as much as 15° below London's horizon.That ought to be plenty to guarantee a very dark night.There's no connection between the Summer Solstice and the phases of the Moon.


What is another name for the Summer Solstice?

Another name for the Summer Solstice is Midsummer.


Are there any places in Great Britain where astronomical twilight ends near the summer solstice?

No. For any location in England, on June 21, the Sun is never more than 18 degrees below the horizon, which is the definition of "astronomical twilight". If by "Great Britain" you mean to included British colonies and possessions, then yes; places like Gibraltar and Bermuda are far enough south so that the do experience complete darkness at night.


Was there a full moon on the Summer Solstice in 1964?

The summer solstice in 1964 occurred on June 21. Checking for a full moon on that specific date in 1964 would require further research into astronomical records or databases that track moon phases for that year.


Is Stonehenge England far enough south for complete darkness to occur near the summer solstice - as in no twilight along the northern horizon?

The summer solstice is the longest day of the year, but at Stonehenge it still becomes completely dark at night.


What do you think happened to the couples in summer solstice?

There are no couples in the summer solstice.