Light pollution Nelson Correia

1. Outdoor Lighting and
Light Pollution
Álvaro Folhas
29 de junho de 2013

2. What is nightscape?
The dark sky with the stars

3. What is nightscape?
Lighting buildings, streets, and open spaces in urban areas

4. Where are the stars?

5. Light pollution in Portugal and Spain

6. Light pollution in Europe

7. Light pollution in Europe

8. Light pollution in Istambul

9. Light pollution in Egipt

10. Los Angeles in 1908

11. Los Angeles in 1988

12. Light pollution in Earth

13. What is light pollution?
Glare: too much background light tat reduces visibility

14. What is light pollution?
Light Trespass: light spills into an area where it is unneeded

15. What is light pollution?
Sky Glow: upward directed light reflects on particles in the
sky reducing visibility of stars

16. With light pollution & without
With and without outdoor lights on…

17. Bad & good lighting

18. Bad lighting

19. Good lighting

20. Light pollution simulator
http://www.need-less.org.uk

21. Night Sky Simulator
Without light pollution
(Scotland)
Low light pollution
Moderate light pollution
High light pollution
(London)
http://www.need-less.org.uk

22. Without light pollution
(Scotland)
Low light pollution
Moderate light pollution
High light pollution
(London)
Night Sky Simulator

23. Without light pollution
(Scotland)
Low light pollution
Moderate light pollution
High light pollution
(London)
Night Sky Simulator

24. Without light pollution
(Scotland)
Low light pollution
Moderate light pollution
High light pollution
(London)
Night Sky Simulator

25. Light pollution affects…
Energy, Safety & Cost
Astronomical Research
Human Health Wildlife

26. Solutions

27. LuminSáorliuasti obnlinsdadas

28. Solutions

29. Solutions

30. Light shielding demo

31. GLOBE AT NIGHT
Citizen science program
to record the brightness of the night sky
http://www.globeatnight.org

32. GLOBE AT NIGHT

33. Dark Skies Rangers
Portugal
http://dsr.nuclio.pt