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Massive stars, those over ten times heavier than our Sun, are the conduits of most elements of the periodic table and drive the morphological and chemical makeup of their host galaxies. Yet the origin of the most luminous and hottest stars among them, called 'blue supergiants', has been debated for many decades. Blue supergiants are strange stars. First, they are observed in large numbers, despite conventional stellar physics expecting them to live only briefly. Second, they are typically found alone, despite most massive stars being born with companions. Third, the majority of them harbourAdvertised on
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The single star nearest to the Sun is called Barnard’s star. A team of researchers led by the Instituto de Astrofísica de Canarias (IAC), has recently detected a ‘sub-Earth’ orbiting it. This exoplanet, called Barnard b has at least half the mass of Venus and orbits rapidly around its star, so that its year lasts only a little over three Earth days. This new exoplanet is sixteen times nearer to Barnard’d star than Mercury is to the Sun, and has a surface temperature close to 125oC, so it does not have liquid water on its surface. This discovery, led by the IAC in collaboration with a numberAdvertised on
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The POLMAG research group of the Instituto de Astrofísica de Canarias (IAC) has released the public version of P-CORONA, a novel computer program for calculating the intensity and polarization of the light emitted by the million-degree plasma of the solar corona. This plasma diagnostic technique allows scientists to study the magnetic field of the solar corona by comparing their calculations with observations from the most advanced solar telescopes, such as DKIST and Aditya-L1. The solar corona is the outermost region of the solar atmosphere, where the explosive events that can seriouslyAdvertised on