News
Solving the enigma of the brightest planetary nebulae
Planetary nebulae (PNe) are the ejecta of evolved low-intermediate mass stars present in all stellar systems. Perhaps the easiest thing to do when studying PNe...
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NewsSolving the paradox of the enigmatic solar sodium D1 line polarizationIn 1998 the journal Nature published a seminal letter concluding that the mysterious polarization (a particular property of light) that had been recently...
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NewsSpectroscopic follow-up of L- and T-type proper-motion member candidates in the Pleiades.We report on the near-infrared low-resolution spectroscopy and red optical (Z-band) photometry of seven proper-motion, very low-mass substellar member...
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NewsSpiral-shaped wavefronts in a sunspot umbraThere are many oscillatory phenomena in the Sun which show up from the deepest interior layers to the outermost layers of its atmosphere. The study of these...
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NewsSpiral-shaped winds in old stars reveal presence of a partnerTowards the end of their lives some 95% of stars evolve into red giants which lose their mass via a “stellar wind”. Eventually they end up as planetary nebulae...
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NewsStar-forming galaxies in SDSS: signs of metallicity evolution.La evolución de galaxias ha sido ampliamente estudiada a altosdesplazamientos al rojo, pero existen pocos estudios en este campo abajos desplazamientos al rojo...
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NewsStars rich in rubidiumIt has been discovered that the most evolved intermediate-mass stars in our Galaxy are very rich in rubidium. This finding is the first observational evidence...
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NewsStellar mass black holes in ultraluminous X ray sources.Three decades ago one of the first astronomical satellites designed toobserve X-rays detected a new type of object: it had a much higher luminosity than any...
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NewsSTELLAR TIDAL STREAMS IN THE MILKY WAYSe ha descubierto una corriente de marea gigantesca en la galaxia espiral NGC 4013, cuya estructura y edad es muy similar a la corriente estelar de Monoceros...