HomeLatest ThreadsGreatest ThreadsForums & GroupsMy SubscriptionsMy Posts
DU Home » Latest Threads » Forums & Groups » Main » General Discussion (Forum) » What cities would look li...

Thu Dec 27, 2012, 08:48 PM

What cities would look like without light pollution



Have you ever wondered what the night sky might look like with all the city and street lights turned off? Thierry Cohen from Paris did, and through his imagination and exploration, created a digital project called “Darkened Cities.”




http://thierrycohen.com/pages/work/starlights.html#

more
http://www.visualnews.com/2012/12/26/darkened-cities/

37 replies, 4003 views

Reply to this thread

Back to top Alert abuse

Always highlight: 10 newest replies | Replies posted after I mark a forum
Replies to this discussion thread
Arrow 37 replies Author Time Post
Reply What cities would look like without light pollution (Original post)
n2doc Dec 2012 OP
FirstLight Dec 2012 #1
Deep13 Dec 2012 #2
arcane1 Dec 2012 #3
roguevalley Dec 2012 #29
TheMadMonk Dec 2012 #4
NutmegYankee Dec 2012 #5
AtheistCrusader Dec 2012 #11
RomneyLies Dec 2012 #15
BlueJazz Dec 2012 #6
KittyWampus Dec 2012 #34
DollarBillHines Dec 2012 #7
UnrepentantLiberal Dec 2012 #8
UnrepentantLiberal Dec 2012 #9
enough Dec 2012 #10
Liberalagogo Dec 2012 #12
CreekDog Dec 2012 #19
Incitatus Dec 2012 #13
Heather MC Dec 2012 #14
TalkingDog Dec 2012 #23
AZ Progressive Dec 2012 #28
Heather MC Dec 2012 #31
OneTenthofOnePercent Dec 2012 #16
Vox Moi Dec 2012 #17
Mojorabbit Dec 2012 #18
Liberal_in_LA Dec 2012 #20
vanlassie Dec 2012 #21
tk2kewl Dec 2012 #22
LWolf Dec 2012 #24
TransitJohn Dec 2012 #25
postulater Dec 2012 #26
AZ Progressive Dec 2012 #27
Ibisa Dec 2012 #30
savebigbird Dec 2012 #32
bluedigger Dec 2012 #33
KittyWampus Dec 2012 #35
Nikia Dec 2012 #36
TheManInTheMac Dec 2012 #37

Response to n2doc (Original post)

Thu Dec 27, 2012, 08:50 PM

1. creepy cool

I love it!

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 08:50 PM

2. Cool. It would be almost that good with some sensible restrictions.

full cut off lighting where necessary, and no wasteful, unnecessary omnidirectional lighting.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 08:52 PM

3. Now THAT is pretty damned cool!

Reply to this post

Back to top Alert abuse Link here Permalink


Response to arcane1 (Reply #3)

Fri Dec 28, 2012, 08:29 PM

29. amazing.

I imagine city folks would have a hard time with a rural area where it gets really dark at night. Even here in a small town I find the country in winter rather scary. I will say that it makes the auroras better.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 09:04 PM

4. Perhaps, if you had eyes the size of dinner plates.

 

The best dark sky sites in the world couldn't produce a view that speccy without a couple of thousand dollars worth of telescope and electronic sensors. (Or a film camera and several hours of exposures.)

Reply to this post

Back to top Alert abuse Link here Permalink


Response to TheMadMonk (Reply #4)

Thu Dec 27, 2012, 09:07 PM

5. Second that.

I was at Bryce Canyon, UT (which has a spectacular dark sky) during a new moon and the milky was no where near that bright. You could see it, but it didn't glow like that.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to NutmegYankee (Reply #5)

Thu Dec 27, 2012, 10:42 PM

11. It's obviously a composite.

Still, wicked cool looking on the PC.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to NutmegYankee (Reply #5)

Thu Dec 27, 2012, 10:45 PM

15. There is no place in the continental US free of light polution

 

Not even Bryce Canyon, UT.

That said, he's right. It would not be that bright even if 100% of light pollution was eliminated.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 09:08 PM

6. As an amateur Astronomer, I've been saddened by the amount of light pollution ....

..that's been allowed to proliferate.

When I was a boy..here in the Tampa Bay area, I could see stars to the 6th magnitude.
Now, I'm lucky to see a 4th, and most nights I have to strain to see a 3rd mag.

I could accept normal growth but it seems like people do everything to light up 40% of their houses and the other 60% goes into the night sky. Not only is it non-caring but also wasteful.

Call me Johnny-pissed-off

Reply to this post

Back to top Alert abuse Link here Permalink


Response to BlueJazz (Reply #6)

Sat Dec 29, 2012, 12:30 PM

34. Sound pollution is even worse IMO. Sorry to sidetrack.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 09:09 PM

7. I was in NYC during the last blackout (2003)

The sky was surreal.

You could spot the locals, they were walking around like tourists - looking up.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to DollarBillHines (Reply #7)

Thu Dec 27, 2012, 10:32 PM

8. I never thought of that.

 

I wasn't here at the time. I wonder if anyone thought to take pictures with a long exposure?

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 10:35 PM

9. I'll never forget seeing the stars in Arizona when we were

 

on our way to a concert. You felt like they were right on top of you.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 10:38 PM

10. Having been born in 1944, one of the saddest changes

I've observed in my life is the lack of darkness at night.

These photos seem beautiful to me, but very sad.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 10:44 PM

12. I remember

back in 1989, I went to Australia, and was out at Ayers Rock (Uluru) at night...and the sky was unbelievable. I'm a city boy, so it completely floored me how much you could see in the desert night sky. I saw satellites moving overhead with the naked eye. Whenever I'm in the country (usually central Texas) and it's clear, I always try to go outside and stargaze. It's not anywhere near as good as the Aussie desert, but it's refreshing.

PS. I was living in San Francisco for a bit and we had a city blackout, and the sky, while star-filled, looked nothing like the 3rd pic.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to Liberalagogo (Reply #12)

Fri Dec 28, 2012, 03:55 AM

19. light is only one thing that obscures the sky, moisture does too

that's why getting away from light sources and moisture sources (going to the desert) improves the view of the sky.

also, higher altitude means you're looking through less atmosphere.

so go somewhere in the high desert away from cities and you will be amazed --the hinterlands of Utah and Nevada even eastern Oregon have amazing night skies.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 10:44 PM

13. I've been far out in the Gulf of Mexico and the Atlantic in the middle of the night on couldless

nights. The sky was amazing compared to where I live in Florida, but it did not look as great as in those pictures.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 10:45 PM

14. pretty but light are needed in the city at night.

I see these pictures and think gee I wonder how many houses are getting broken into right now, and how many people are getting mugged or worse. Not that people don't do those things with the lights on. but eeek very scary with the lights out

Reply to this post

Back to top Alert abuse Link here Permalink


Response to Heather MC (Reply #14)

Fri Dec 28, 2012, 06:56 PM

23. Let's examine the logic of what you are saying

If you drove by a totally dark house and saw a guy with a flash light on the outside trying to get in (because only the very skilled can pick a lock without seeing what they are doing) would you figure that the house was being broken into or.....what?

Muggings same thing. Studies suggest muggers pick victims based on body language. Can't see body language if everybody is in the dark.

Street lights and "safety" lights allow burglars and muggers an easy way to spot targets. We have never had safety lights in our yard. They are worse than pointless.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to TalkingDog (Reply #23)

Fri Dec 28, 2012, 08:15 PM

28. I guess people enjoy not being able to see their way walking down the street at night

and maybe tripping on something and falling, or a car hitting someone because no lights at night are there to illuminate the person until the last second when the person walking is in view of the car lights. "Light Pollution" in cities like Los Angeles and Chicago actually helps to illuminate streets at night that are not lit by street lights.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to TalkingDog (Reply #23)

Sat Dec 29, 2012, 12:13 PM

31. ok

the city would be lit up by the stars and the moon you would be able to see.

and a well placed towel and Hammer would do the job of breaking a window and no 1 would hear it. So no need for fan y lock picking tools

or they just find a window that is not locked.

pardon me for living in a world where crime is committed in the dark

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 11:04 PM

16. It's so dark out here you walk into shit without a flashlight & the sky looks just like that.

 

It really is breath taking. During that Gemini meteor shower a week or so ago, you could see little & big ,eteors every couple of seconds.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Thu Dec 27, 2012, 11:36 PM

17. Something approaching that is possible and I don't know why it isn't being done

LED lighting is an energy and cost-saving alternative right now.
Light pollution conventional light sources blaze forth in all directions while the directed illumination with LEDs is superb.
The technology is firmly in place and the economy of the switch well documented.
I'm not shilling for LEDs, but I spent many years living in a city and thinking how beautiful it would look if we put light only where we needed it.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Fri Dec 28, 2012, 03:38 AM

18. Gorgeous. nt

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Fri Dec 28, 2012, 05:37 AM

20. 94 Northridge quake - we stood outside and saw the stars because

electricity was off.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Fri Dec 28, 2012, 06:30 AM

21. I saw the sky while on the island of Moorea

in the South Pacific... I had never seen the Southern Cross- WOW.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Fri Dec 28, 2012, 01:02 PM

22. one highlight of being out of power for 2 weeks after sandy was the night sky

i enjoyed going outside at night and seeing stars for a change

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Fri Dec 28, 2012, 07:02 PM

24. I just glance outside at night.

Living rurally, my night sky is breathtaking. It makes driving at night a little different; around here, things close up and people go home. There are some street lights in town, but as soon as you get to the edge, no more street lights, at all. Even on the highway.

The small city to the south creates some light pollution, but nothing in comparison to large cities.

It's so dark that, with no moon, if the porch light is off I need a flashlight to find my way from the car to the front door.

Once, about 8 years ago, my son wandered outside, forgot the flashlight, and ran into a cow. Literally. It breached the fence from it's pasture next door. Black angus in the dark.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Fri Dec 28, 2012, 07:32 PM

25. It's what rural denizens who are often vilified by those with urban privelege enjoy nightly

Most of my life was spent in Wyoming. I got to see that a lot.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to TransitJohn (Reply #25)

Fri Dec 28, 2012, 07:52 PM

26. Top of the Beartooth Mtns

with a full moon bright enough to read by.

I'll never forget it.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Fri Dec 28, 2012, 08:08 PM

27. It doesn't really look like that, I've driven around the country and I know that

I've driven around the country several times and were in very rural in the middle of nowhere areas between cities many times (especially in the west) and...

The skies are not nearly that bright at night. Those pictures are taken only with cameras set to take long exposures (30 seconds or more) that exxagerate the brightness. Many photos taken at night outside exxagerate the brightness (because the photographer cares more about making a beautiful photo than being accurate.)

Besides, cities need light partly as a crime deterrent. If everywhere would be dark it would be easier for criminals at night to do their stuff. BTW, even small cities I've been to have significant light pollution that glows from at least 10 miles away.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Sat Dec 29, 2012, 12:50 AM

30. Love it! From a lighting and lighting controls professional

I am in the lighting industry. It kinda makes me sick when I fly into Chicago and see the glowing sky and think of both all of the waste as well as the harm to the visual environment.

We won't eliminate light spill and reflections completely, but all of the 'wall packs' and such just blast light everywhere with no real direction.

The only thing we need to watch for is that some cities and designers are retrofitting with LED fixtures without considering the previous light spill onto the sidewalks, from a safety standpoint. If they aren't careful, they save lots of energy (while spending high $ upfront unfortunately), but also at the expense of pedestrian safety. There are plenty of ways to address it, but people need to be diligent.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Sat Dec 29, 2012, 12:19 PM

32. This is great!

Whenever I bring up the topic of light pollution with people I know, they look at me like I'm strange. I'm glad I'm not the only one thinking about it.

Reply to this post

Back to top Alert abuse Link here Permalink



Response to bluedigger (Reply #33)

Sat Dec 29, 2012, 12:32 PM

35. Phenomenal, thanks. Some definite wallpapers there.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Sat Dec 29, 2012, 01:02 PM

36. While I appreciate the sentiment and energy savings,

I was so glad that there are city street lights for when I went running in the mornings before work when I worked during the day.
Now that I work until 2 am in a town 30 miles away in a non metro area, I have been so relived when I have had the "city" lights when driving through fog or snow.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to n2doc (Original post)

Sat Dec 29, 2012, 01:18 PM

37. 25 million North Koreans already know.

I doubt they like it very much.

Reply to this post

Back to top Alert abuse Link here Permalink

Reply to this thread