Slashdot Mirror
Town Turns Off the Lights To See the Stars
Hugh Pickens writes "Stargazing skies all over the world are disappearing, as the sky above New York City is Class 9 on the Bortle ranking and American suburban skies are typically Class 5, 6, or 7. But some places are making an effort to preserve their skywatching heritage as Exmoor National Park was granted International Dark-Sky Reserve status in November and people in the Exmoor town of Dulverton were challenged to switch off their lights as part of the BBC's Stargazing Live, demonstrating that you don't need special equipment to see the stars more clearly, if you have a decent pair of binoculars. 'The whole idea is to show that even a small town, which is still quite dark, can give off quite a lot of light,' says astronomer Mark Thompson. The event in Dulverton gained a lot of support from local residents and businesses. 'It needed a bit of organization to get everyone to say yes,' says town mayor Chris Nelder. 'We want people to just enjoy the night sky, to treasure the fact we have them and to look after them,' adds Claire O'Connor from Exmoor National Park Authority."
Wish my town would do this from time to time!
I live in a very dark neighborhood... no streetlights within about a mile, and lots of trees (makes stargazing... challenging.) Unfortunately, some of the neighbors don't feel safe unless they leave lights running all night long. It's a very basic human trait: fear of the dark. We have less crime in my dark neighborhood than many nearby well-lit ones, but facts don't erase fear.
It could just be security theatre. People are evolved/inculcated with fear of the dark, so lights make them feel safer. Is there any good evidence to show that providing street lighting makes things safer than people carrying their own light with them?
Korma: Good
That was my comment on the BBC article (which was subsequently voted into oblivion). The street near my friend's house has had its street lighting turned off at night recently (though for energy-saving purposes, not stargazing) and within a month there were two rapes and an assault right there on the street. It is not something I would have thought of right away, but speak to any woman who has ever had to walk home at night, alone, and they will tell you they feel much safer under street lights.
National Geographic mentioned this in an article on this a few years ago on light pollution (I'm too lazy to go find it). A lot of cities are slowing making the transition to lights that only shine downward and waste little into the sky. It's serves the dual purpose of 1) saving energy and 2) cutting down on light pollution.
The main reasons for street lighting is to make obstacles and pedestrians more visible to motorists, to allow pedestrians to move around without carrying a torch, and to make them feel safer.
In this case, they'd closed the roads around the town for this stunt, so no need for worrying about cars, and a good fraction of the population of the town was out on the street, so there were fewer empty dark back alleys down which to get stabbed (plus it's a small rural town; if it's anything like mine crime is generally livestock related...), and everyone there knew about it months in advance, so I'd expect they were stocked up on torches and batteries. It was just a shame it was so cloudy!
If you have never seen the stars without light pollution, go to somewhere in the middle of nowhere and have a look. It's quite hard to do in the UK, as our population density (and thus light pollution) is many times that of the US, so there aren't many really empty places left. It's a real tragedy that for a little convenience and marginal extra safety we've given up our window seat at the edge of the rest of the universe.
"Always consider the possibility that installing a light may aid criminal activity."
http://www.britastro.org/dark-skies/crime.html#noreduction
Bad guys who wave flashlights are easier to spot than bad guys who don't need extra lighting.
Operator, give me the number for 911!
People may say they feel whatever, but there are plenty of studies that show no correlation, or even an increase in crime.
Light can be a great help to criminals. Not least of which they're easier to spot when waving a flashlight. Also, if your under a streetlight, EVERYBODY NOT under a light is automatically hidden from you. But when everyone is in equal lighting and can see equally, it's harder to hide.
It's amazing how many people don't even know their eyes will adjust.
Most probably some types of crime will go up and others will go down. I'll leave it to you type "street lights crime study" into google.
Operator, give me the number for 911!