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

Astronomers have used telescopes around the world, includingthe Gran Telescopio Canarias (GTC or Grantecan) at the Roque de los Muchachos Observatory on La Palma, to study the asteroid 1998 KY26, revealing it to be almost three times smaller and spinning much faster than previously thought. The asteroid is the 2031 target for Japan’s Hayabusa2 extended mission. The new observations offer key information for the mission’s operations at the asteroid. “We found that the reality of the object is completely different from what it was previously described as,” says astronomer Toni Santana-Ros, a

Statement supporting the selection of La Palma for the Thirty Meter Telescope (TMT) site: The Comité Científico Internacional (CCI) of the Canary Islands Observatories enthusiastically welcomes the possibility that the Thirty Meter Telescope (TMT) may ultimately choose the Observatorio del Roque de los Muchachos (ORM) on La Palma as its site. The ORM offers outstanding astronomical conditions, decades of successful international cooperation in operating telescopes, and a robust legal framework protecting its dark skies. At its meeting on 27 November 2025 on the island of La Palma, the CCI