Kyba, Christopher Conrad Maximillian http://orcid.org/0000-0001-7014-1843
Spitschan, Manuel
Article History
Received: 14 May 2018
Revised: 31 May 2018
Accepted: 15 June 2018
First Online: 25 December 2018
Competing interests
: C.K. held an uncompensated position on the board of directors of the International Dark-Sky Association from 2012 to 2015. M.S. declares no competing interests.
: C.K. is funded by the German Research Centre for Geosciences, and also acknowledges funding from the European Union’s Horizon 2020 Research and Innovation Program under grant agreement no. 689443 via project GEOEssential. M.S. is supported by a Wellcome Trust Sir Henry Wellcome Postdoctoral Fellowship (204686/Z/16/Z). The funders had no influence on the text or decision to publish.
: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).