Universidad Complutense de Madrid (UCM; http://www.ucm.es/) is the largest and one of the oldest universities in Spain. With an annual budget almost reaching 550M€ and more than 80,000 students, the UCM is home of research groups which are in the cutting edge of research in many areas. UCM’s technological scientific infrastructure, together with the quality of its researchers, has established some of its laboratories to be considered among the best in Europe. The GUAIX Group (Extragalactic Astrophysics and Astronomical Instrumentation UCM group) is involved in the ACTION project. GUAIX has been working on Outreach and citizen science related with Astrophysics since 1990.
It is currently composed of 7 senior researchers, 4 postdoctoral researchers and several Ph.D. students. The research of the group covers several fields in Astrophysics: Galaxy properties and evolution, Astronomical instrumentation, scientific databases and data analysis, Meteors and Fireballs and Light Pollution. The group has led several regional, national and European research projects. GUAIX contributes to the operation of UCM astronomical observatory and the UCM laboratory of advanced scientific instrumentation (LICA; http://guaix.fis.ucm.es/lica).
An international consortium led by the GUAIX group has designed and built MEGARA a multi-object astronomical spectrograph installed at the Gran Telescopio Canarias 10.4m telescope. Finally, GUAIX coordinates all activities related with astronomy outreach at UCM.
GUAIX is also leader of the studies of light pollution with a huge potential in citizen science. One of the most fruitful citizen science projects currently active is “Cities at night” (http://www.citiesatnight.org/), where more than 20,000 people are helping to classify and identify night images of the Earth taken from the International Space Station and other satellites in space. This huge amount of data is being used to characterize the light pollution in the main cities of all around the world.
The UCM contribution to the Stars4All project also included the NixNox citizen science project (http://nixnox.stars4all.eu/) where amateur astronomers locate and characterize places to observe the starry skies. For another citizen project: the European Photometer Network (http://stars4all.eu/tess) the UCM team developed a low cost but reliable device (TESS-W) that measures the sky brightness during the night to monitor the evolution of the light pollution (http://tess.stars4all.eu)

Universidad Complutense de Madrid (UCM; http://www.ucm.es/) is the largest and one of the oldest universities in Spain. With an annual budget almost reaching 550M€ and more than 80,000 students, the UCM is home of research groups which are in the cutting edge of research in many areas. UCM’s technological scientific infrastructure, together with the quality of its researchers, has established some of its laboratories to be considered among the best in Europe. The GUAIX Group (Extragalactic Astrophysics and Astronomical Instrumentation UCM group) is involved in the ACTION project. GUAIX has been working on Outreach and citizen science related with Astrophysics since 1990.
It is currently composed of 7 senior researchers, 4 postdoctoral researchers and several Ph.D. students. The research of the group covers several fields in Astrophysics: Galaxy properties and evolution, Astronomical instrumentation, scientific databases and data analysis, Meteors and Fireballs and Light Pollution. The group has led several regional, national and European research projects. GUAIX contributes to the operation of UCM astronomical observatory and the UCM laboratory of advanced scientific instrumentation (LICA; http://guaix.fis.ucm.es/lica).
An international consortium led by the GUAIX group has designed and built MEGARA a multi-object astronomical spectrograph installed at the Gran Telescopio Canarias 10.4m telescope. Finally, GUAIX coordinates all activities related with astronomy outreach at UCM.
GUAIX is also leader of the studies of light pollution with a huge potential in citizen science. One of the most fruitful citizen science projects currently active is “Cities at night” (http://www.citiesatnight.org/), where more than 20,000 people are helping to classify and identify night images of the Earth taken from the International Space Station and other satellites in space. This huge amount of data is being used to characterize the light pollution in the main cities of all around the world.
The UCM contribution to the Stars4All project also included the NixNox citizen science project (http://nixnox.stars4all.eu/) where amateur astronomers locate and characterize places to observe the starry skies. For another citizen project: the European Photometer Network (http://stars4all.eu/tess) the UCM team developed a low cost but reliable device (TESS-W) that measures the sky brightness during the night to monitor the evolution of the light pollution (http://tess.stars4all.eu)