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PostPosted: Sat Jun 11, 2016 10:31 am 
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Location: Lancashire
Scientists are saying that a third of the global population are unable to see the Milky Way because of light pollution.
A press report some years ago said that when Los Angeles had an electricity blackout because it couldn't pay its electricity bill, some of its citizens were terrified to see the Milky Way blazing down on them. It was so unfamiliar to them that they were overcome by it in a negative way.
The problem of light pollution is most acute in developed economies. It's reckoned that in the USA, 80 per cent of the population is affected by light pollution.
Dr. Chris Elvidge at the National Center for Environmental Information in Boulder, Colorado, said: We've got whole generations of people in the US who have never seen the Milky Way. It's a big part of our connection with the cosmos - and it's been lost."
A team of American and Italian scientists have come up with a new atlas of global light pollution published in the journal "Science Advances". The darkest regions to date are Canada and Australia. In Western Europe, only a few places remain relatively unaffected by light pollution, mainly Scotland, Norway and Sweden.
Here in the North West, parts of the Lake District and the Yorkshire Dales can stlll offer dark sky conditions.

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PostPosted: Sun Jun 12, 2016 8:39 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
It is all very well having special areas "in the countryside" where it is "dark enough" to see the Milky Way, there are some areas of the South Downs Country Park which apparently are pretty dark, but that does not help an individual who wants to "skywatch" from his home regularly, especially if not a car driver. Therefore, although I can often see the Milky Way from my back garden, specially in the early hours, it is most sensible for me to concentrate on objects that I can see well - sometimes if the damned clouds will permit.
The fact that in the blackout in the USA, people did not recognise the Milky Way and apparently were afraid or upset by it, hardly surprises me as even well-educated people cannot even recognise some of the brightest objects in the sky and are often even surprised that you can actually see the Moon in daylight or Jupiter with the unaided eye, confuse comets with meteors and even more worrying confuse astronomy with astrology. regards maf - grey & raining here!


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PostPosted: Sun Jun 12, 2016 1:17 pm 
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Many astronomers are taken aback and don't know what a circumzenithal arc is.
Even though very experienced they think they have seen something new.

I haven't seen the Milky Way for about 20 years.

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David


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PostPosted: Mon Jun 13, 2016 10:13 am 
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You can buy your own Milky Way at any general store David, but not so good for the teeth :wink: .

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Last edited by brian livesey on Fri Jun 24, 2016 10:11 am, edited 1 time in total.

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PostPosted: Mon Jun 13, 2016 2:42 pm 
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Fluorigard once a day and floss and it is fine.

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David


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PostPosted: Mon Jun 13, 2016 6:59 pm 
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Location: Wellingborough
Also here:
https://www.theguardian.com/science/201 ... -pollution

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PostPosted: Mon Jun 12, 2017 6:03 pm 
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Just been reading a book about North Korea and a satellite pic of the area shows just black where N. Korea is.
Don't fancy moving there though just to see the milky way.
Oddly enough when I lived in Surrey inside the M25 I often saw the milky way.


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PostPosted: Tue Jun 13, 2017 1:06 pm 
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Location: Lancashire
whether or not we can see the Milky Way from urban and suburban locations, depends to a large extent on artificial light pollution levels combined with air humidity and particulate pollution.
If we have unshielded lights blazing directly in our face, as we have with unshielded road lamps and security lights, the glare will obviously prevent us from seeing the Milky Way.
If the night air is high in water vapour and/or particles of soot, light shining up into the sky will be reflected back to the ground, obscuring the Milky Way.
There are occasions when it's still possible to see the Milky Way - at least directly overhead - from urban areas when the air is relatively dry and particle-free, and the observer is shielded from direct exposure to artificial lights.

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PostPosted: Sun Jun 18, 2017 5:40 am 
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Location: Portslade, Sussex Lat 50deg 51min Long 0deg 13mins West
I live in what used to be rather a rural area, Mile Oak, Upper Portslade, being just a few roads leading up to Mile Oak Farm. The whole dry chalk valley is now pretty much been built on in the last 50 years, and I guess is mostly now suburban with semi-rural hills nearby. Out of the view of direct street lighting (if one situates oneseft correctly), the back garden also backs onto the Park. The visibility of the Milky Way to the unaided eye can be quite surprisingly obvious given just the right conditions. Only a couple of days ago while skywatching after midnight, I thought "Oh, looks like a bit of cirrus cloud building up there", and then realised that it was, of course, the Milky Way in Cygnus. regards maf


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