Juan Ruiz Alzola, Rafael Rebolo and Pedro Álvarez made a presentation of the scientific activities which will be carried out on the Gran Telescopio Canarias (GTC) as a result of the signing of three agreements

The discovery of metal-rich planetary nebulae in the outer regions of the Andromeda Galaxy, using data from the GTC, gives evidence of a possible encounter between galaxies

Imágenes y vídeo del cometa Lovejoy tomados desde el Observatorio del Teide, en Tenerife (Islas Canarias), y sus inmediaciones

Its latest data release contains information about 470 million stars and galaxies

We obtained GALEX FUV, NUV, and Spitzer/IRAC 3.6 µm photometry for >2000 galaxies, available for 90% of the S4G sample. We find a very tight "GALEX Blue Sequence (GBS)" in the (FUV − NUV) versus (NUV − [3.6]) color-color diagram which is populated by irregular and spiral galaxies, and is mainly driven by changes in the formation timescale (τ ) and a degeneracy between τ and dust reddening. The tightness of the GBS provides an unprecedented way of identifying starforming galaxies and objects that are just evolving to (or from) what we call the "GALEX Green Valley (GGV)". At the red end of the

Recent high-resolution and high-cadence observations have surprisingly suggested that prominence barbs exhibit apparent rotating motions suggestive of a tornado-like structure. Additional evidence has been provided by Doppler measurements. The observations reveal opposite velocities for both hot and cool plasma on the two sides of a prominence barb. This motion is persistent for several hours and has been interpreted in terms of rotational motion of prominence feet. Several authors suggest that such barb motions are rotating helical structures around a vertical axis similar to tornadoes on