An international team of astronomers, including researchers from the IAC, have performed a unique cosmic test - measuring the mass of an ancient star using two entirely different methods, finding agreement to within just 1.4%. This result marks a milestone in our ability to determine the ages of old stars and use them as living fossils to study the Milky Way’s distant past. The team analysed the red giant in the binary system KIC 10001167 using two independent approaches: firstly, by measuring the brightness and radial velocity variations due to the orbital motion of the binary, and secondly

The ONCE is dedicating its lottery ticket for Sunday, June 29, to the 40th anniversary of the Instituto de Astrofísica de Canarias (IAC). Five and a half million coupons will spread the word about this anniversary throughout Spain, featuring an image of the Gran Telescopio Canarias (GTC or Grantecan), the world's largest optical-infrared telescope, located at the Roque de los Muchachos Observatory (La Palma). Since it began scientific operations in 2009, the GTC has become a symbol of the scientific and technical consolidation of the IAC and the Canary Islands Observatories (OCAN), and its

El Observatorio del Teide recibe este fin de semana a cerca de 1.000 visitantes en sus tradicionales Jornadas de Puertas Abiertas, organizadas por el Instituto de Astrofísica de Canarias (IAC) con motivo del solsticio de verano. Esta iniciativa, ya consolidada en el calendario divulgativo del IAC, ofrece a la ciudadanía la oportunidad de acercarse a la ciencia y a las infraestructuras científicas de Canarias de forma directa y cercana. La actividad está coordinada conjuntamente por el propio Observatorio y por la Unidad de Comunicación y Cultura Científica (UC3) del IAC, en el marco de las