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H II regions are ionized nebulae associated with the formation of massive stars. They exhibit a wealth of emission lines in their spectra that form the basis for estimation of chemical composition. The amount of heavy chemical elements is essential to the understanding of important phenomena such as nucleosynthesis, star formation and chemical evolution of galaxies. For over 80 years, however, a discrepancy exists of a factor of around two between heavy-element abundances (the so-called metallicity) derived from the two main kinds of emission lines that can be measured in nebular spectra
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An international team of astronomers, in which researchers from the Instituto de Astrofísica de Canarias are taking part, share the intricate and delicate beauty of the classical nebula Messier 87, showing unprecedented detail, which gives a fascinating view of this celestial wonder.
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La Palma will host a new edition of Starmus in 2024, according to Rafael Rebolo, director of the Instituto de Astrofísica de Canarias (IAC), and Garik Israelian, co-director of the festival and astrophysicist, at a press conference held at the IAC headquarters in La Laguna. "We are working to make this a reality and the way we have found is to relate it to the protection of the sky as an asset of humanity, which is why we will go hand in hand with the Starlight Foundation. There is still time to make society aware of the pollution of our sky, especially with the launch of small satellites
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