Lithium, a new key to the search for planetary systems.
Lithium-poor “twin” stars to the Sun targetted. Stars similar to the Sun that have a low lithium content are strong candidates for hosting planets according to...
The Gran Telescopio CANARIAS open new prospects to characterise the oldest population of stars in our Galaxy with the discovery of a cold and distant low...
Low Mg/Si Planetary Host Stars and Their Mg-depleted Terrestrial Planets.
Simulations have shown that a diverse range of extrasolar terrestrial planet bulk compositions are likely to exist based on the observed variations in host star...
Almost all massive stars explode as supernovae and form a black hole or neutron star. The remnant mass and the impact of the chemical yield on subsequent star...
The Butterfly Nebula (Minkowski 2-9) is an outstanding example of a highly collimated outflow from an evolved star. The formation of these extreme nebular...
We have selected the Galactic HII region M43, a close-by apparently spherical nebula ionized by a single star (HD37061, B0.5V) to investigate several topics of...
We present a visual determination of the number of bright points (BPs) existing in the quiet Sun, which are structures thought to trace intense kG magnetic...
Mapping solar magnetic fields from the photosphere to the corona
The solar chromosphere is the region between the relatively thin and cold photosphere (temperature of a few thousand degrees) and the hot and extended corona...