Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Globe at Night Citizen Science - Connie Walker


Published on

Presented at the GHOU 2018 conference in Vienna, Austria from 13-15 August.

Published in: Education
  • Be the first to comment

  • Be the first to like this

Globe at Night Citizen Science - Connie Walker

  1. 1. Globe at Night Citizen Science: Assessing the Darkness of our Skies 1 ConnieWalker National Optical Astronomy Observatory Photo Credit: BabakTafreshi (TWAN)
  2. 2. Light pollution is a global issue with local solutions…
  3. 3. Energy, Safety & Cost Human Health Wildlife Light Pollution affects… Astronomical Research
  4. 4. How to bring awareness & a desire to slow down the increase in light pollution? (Cinzano, Falchi, and Elvidge 2001)
  5. 5. Globe at Night 5
  6. 6. Globe at Night An Effective Worldwide Program What: Invites citizen-scientists to measure their night sky brightness and submit their observations to a website from a computer or smart phone: Who: people aged 8 and up When: 10-day campaigns each month (no Moon in late evening) Where: Anywhere; everywhere! How many: Nearly 179,000 measurements from 180 countries in the last 12 years. 6
  7. 7. • Offered 10 days every month all year • Four different methods of data taking • Translations into 28 languages for the report page • Translations into 21 languages for the guides and postcards • Platform independent • On the fly mapping • Infographics • Evaluations Globe at Night: A Powerful EducationalTool
  8. 8. Good and Bad Lighting vs How Many StarsYou Can See 8Vienna,Austria
  9. 9. No Orion data Match Night Sky to a Magnitude Chart. Estimate cloud coverage. Input location, date & time.
  10. 10. 10
  11. 11. When did you make your observations? Where did you make your observations? How dark is the sky? What are the sky conditions? Did you use a Sky Quality Meter? 2 3 4 5 6 Send data. Globe at Night: 6 Simple Steps 1
  12. 12. 12 A more technically accurate approach: using Sky Quality Meters • Light enters here: •Press start button here: • Read-out numbers here:
  13. 13. Simple Report Form Cell Phone Desktop/ Laptop Measurements • are downloadable as datasets in various formats • can be examined online via Google Earth or other tools • used as the basis of research in a classroom or science fair project or even to inform the development of public policy Tablet/Pad 13
  14. 14. Projects • Compare data over time (changes, trends) • Compare data on population density • Use in a lighting survey • Search for dark sky oases • Monitor ordinance compliance • Study affects of light pollution on animals or plants • Study affects on human health • Study affects on safety, security, energy consumption, cost Tucson, Arizona, USA14
  15. 15. How have Globe at Night citizen-scientists made a difference when assessing their night sky? 15
  16. 16. 1st National Geographic BioBlitz “Night Sky Inventory” 100 brighter at city center than 40 km away (east) 2011 Boy Scouts Amateur Astronomers & the Public Park Rangers
  17. 17. 2011 2012 Over 200 km from Berlin to Leibniz Highlights from Citizen Scientists 2012
  18. 18. Highlights from Citizen Scientists 1200 pts from Montevideo, Uruguay 1800 pts; 1200 from Astrobaza high schoolers in Poland. 2014 2015 18 2014
  19. 19. Impact of City Lights on Lesser Long-nose Bat 19 3500 SQM measurements went into this contour map which also shows paths of 13 bats avoiding city center  protect the corridor?
  20. 20. City-Wide Lighting Inventory Norman, Oklahoma 1 km N
  21. 21. Penn-Harris-Madison School Corporation (District) near South Bend, IN. Students asked, "How much of the night sky have we already lost?” 5 km North A School District Campaign: Near South Bend, Indiana
  22. 22. A School District Campaign: Near South Bend, Indiana
  23. 23. Does Light Pollution Affect Night Birds? 1st prize regional science fair 5th grade 23
  24. 24. Center of Tucson Observatories Outskirts of Tucson Behavior of Night Sky Brightness overTime Using SQM stations (with housing) for over 1 yr every minute each night.
  25. 25. Comparison of Methods of Night Sky Brightness Measurements -23 -21 -19 -17 Mag/sq arcsec other devices vs Mag/sq arcsec of SQM #8161 17 1915 21
  26. 26. Publications • Barentine, J.C.,Walker, C.E., Kocifaj, M., Kundracik, F, Juan, A., Kanemoto, J. and Monrad, C.K. 2018, Journal of Quantitative Spectroscopy and RadiativeTransfer, “Skyglow Changes OverTucson, Arizona, Resulting from A Municipal LED Street Lighting Conversion”, in print. • Kyba, C.C.M. ...Walker, C.E., et al. 2015, Scientific Reports 5: 8409, “Worldwide variations in artificial skyglow”. • Birriel, J.J.,Walker, C.E. andThornsberry, C.R. 2014, JAAVSO, vol. 42, no. 1, 219, “Analysis of SevenYears of Globe at Night Data”. • Kyba, C.C.M.,Wagner, J.M., Kuechly, H.U.,Walker, C.E., Elvidge,C.D., Falchi, F., Ruhtz, R., Fischer, J., Hölker F. 2013, Scientific Reports 3: 1835, “Citizen Science ProvidesValuable Data for Monitoring Global Night Sky Luminance”. 26
  27. 27. New Initiatives • SciStarter (Dashboard) • Fieldscope (Analysis) • STARS4ALL (LP Initiatives) ( ( (
  28. 28. Summary • Important to develop programs aimed to inspire and motivate children and educators to enjoy and to care for the night sky as guardians of the starry skies and its associated cultural values. • Globe at Night (, an international campaign to raise public awareness of the impact of light pollution. • People use the data to monitor levels of light pollution around the world, as well as understand light pollution's effects on energy consumption, plants, wildlife, human health and our ability to enjoy a starry night sky. • Globe at Night allows us to teach our children (and the general public) to be better stewards for tomorrow, to learn to light more responsibly and that the solutions are simple and feasible. …Come join us.
  29. 29. Remaining Campaigns in 2018 Cygnus (North) and Sagittarius (South) September 1-10 Pegasus (North) and Sagittarius (South) October 1-10 Perseus (North) and Grus (South) October 30 – November 8 November 29 -- December 8 29
  30. 30. I often think that the night is more alive and more richly colored than the day. Vincent Van Gogh Together, Let’s Save Our Cultural Heritage!
  31. 31. Connie Walker • Globe at Night Program Director • 1-520-318-8535 or • Websites of interest  Globe at Night campaign:  Quality Lighting Teaching Kit:  Dark Skies Rangers activities:  The International Dark-Sky Association: Contact Information 31
  32. 32. Thank-you for your kind attention! Globe at Night outreach event organized by Joan Chamberlin (a teacher from Maine) visiting students in Nepal Students and Advisor from Clube Ciencias Alunos (Portugal) participate in Globe at Night.
  33. 33. Questions? 33
  34. 34. 34
  35. 35. When did you make your observations? 35
  36. 36. When did you make your observations? 36
  37. 37. Where did you make your observations? 37
  38. 38. How dark is the sky? 38
  39. 39. What are the sky conditions? 39
  40. 40. Did you use a Sky Quality Meter? 40