A recent study analyses data collected at 44 of the darkest places in the world, including the Canary Island Observatories, to develop the first complete reference method to measure the natural brightness of the night sky using low-cost photometers. Of the 44 photometers in the survey, the Roque de los Muchachos Observatory (Garafía, La Palma, Canary Islands) stands out at the darkest of all the skies analysed. The night sky is not completely dark; even in the remotest places there is a glow in the sky produced by natural components, both terrestrial and extraterrestrial, and by artificial

The astronomical event of the year took place on December 21st, a very close conjunction of Jupiter and Saturn which was broadcast on Internet in the channel of astronomical events Sky Live TV and the Cultural Section of Astronomy Cassiopeia of the University of La Laguno on the 20th and 21st from the Teide Observatory. Images and videos of the conjunction were taken, and they are detailed in this press release.

The aim of this collaboration is to improve the coordination and the efficiency of the work which the two organizations perform to protect biodiversity in the area of the Roque de los Muchachos, and to ensure a rapid reaction to new threats.