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How many stars can we still see? - The starlight wiki

Distribution of the total radiation - the light at night - in 2012 at the Setagaya - Tokyo Lightmeter station Details of the Setagaya station at the GAVO Lightmeter data-centre. The distribution of the decadic logarithm of total radiation in Watt per squaere meter W/m² is are shown as measured from June to December 2012 (courtesy Nobuaki Ochi and the Setagaya station.
Legenstein-Lighteter Maerz 2012 IMG 9142 viertel.JPG
Armazones Lightmter on 30mtower.JPG
Armazones Lightmeter preinstall.JPG
Lightmeter Teide observatory.jpeg
L26 Paranal Lux und 100s sigma 20 bis 28Juli2009 grob tageskalibiert.png
Juni2009 Linz Wien Berlin Tautenburg.png
Juni 12bis17 2009 Berlin Tautenburg.png
L14 Berlin Feb Mae 2009.png
L12 TLS 26Sep bis 7Nov2008.png

Lightmeter: A network of newly-developed, low-cost lightmeters starts the global continuous monitoring of artificial night sky brightening (light pollution). Jan. 2013: >300 Lightmeters. more

May 3rd: Mediawiki update to Version 1.22.2 completed on May 3rd; GW --NorbertHerz (Diskussion) 22:08, 3. Mai 2014 (CEST). --Nero2401 (Diskussion) 22:35, 3. Mai 2014 (CEST)

Apr. 14th, 2014: Vienna's lightdome shows 10% increase 2013, the 3rd year of network-monitoring Licht über Wien III (Vienna Environmental Protection Agency), (pdf, 3MB)

Sep. 26th 2013: Gabriel Stoekle (GAVO) announces the easy-Lightmeter, a Rasberry PI data logger for the Lightmeter that automatically records and transfers data to the GAVO-database, http://licht.sternhell.at/ - the software should be released in a couple of months.

June 11th 2013: Report on one year of monitoring with the Vienna Lightmeter Network Licht über Wien II: Wiener Lichtbericht 2012 online at the Wiener Umweltanwaltschaft (Vienna Environmental Protection Agency).

Jan. 12th 2013: First results from the new SETAGAYA (Tokyo) station as presented at a star party on 11 Jan. at the Setagaya Planetarium. From June to December 2012 the light at night 8 km from the centre of Tokyo scatters around the maximum full-moon values but some hours during the year are 15 times darker than the full moon - still about 10 times above natural light at night. --GuentherWuchterl 17:03, 14. Jan. 2013 (UTC)

Sep. 20th 2012:, 8 UTC first light for the southernmost Lightmeter (47° S) at Mt. John Observatory, Lake Tekapo in the Lake Tekapo - Aoraki - Mount Cook Starlight Reserve, New Zealand, http://starlightreserve.org (IDA gold http://www.darksky.org/page/IDSReserves ).


Apr. 27th 2012:, Light over Vienna - a study of the energy content of Vienna's light-dome and the top light emitters (in german): Download pdf from WUA at the Vienna enviromental protection agency WUA, http://wua-wien.at/


How many stars can we still see?: Simple naked eye sightings of the Little Dipper or Orion serve to determine the quality of the world's night skies. more


News

Related

PV light measurement at twilight and night, Brno Observatory

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