Night Sky Brightness Data


Notes: the real time data are updated once every 5 minutes by the median values of the night sky brightness of the past 15 minutes; the past data are the median values of last night.

Co-organizers


contact us

© 2015 Department of Physics, HKU; IAU-OAO
Disclaimer:This website is produced and maintained by the University of Hong Kong and the International Astronomy Union, Office of Astronomy Outreach. The organisation endeavours to ensure the accuracy of the information contained on this website. The information provided by this website is for a general, indicative purpose only. Credits or copyrights are stated for some of the information or images.