The distribution of galaxies on a colour-magnitude diagram reveals a bimodality, featuring a passively evolving red sequence and a star-forming blue cloud. The region between these two, the green valley (GV), represents a fundamental transition where quenching processes operate. We exploit an alternative definition of the GV using the 4000 Å break

Accurate line lists are crucial for correctly modelling a variety of astrophysical phenomena, including stellar photospheres and the atmospheres of extrasolar planets. This paper presents a new line database TOTO for the main isotopologues of titanium oxide (TiO): ^{46}Ti^{16}O, ^{47}Ti^{16}O, ^{48}Ti^{16}O, ^{49}Ti^{16}O, and ^{50}Ti^{16}O. The ^

The "European CMB Coordinator" group has a roadmap consisting of three axes: One is to build and deploy a 5m reflecting telescope at the South Pole; a second is to build and deploy 0.5m refracting telescopes in the Atacama Desert in Chile; and a third is to deploy low-frequency telescopes aimed at characterizing the sky in the 5-40 GHz range.

We outline a number of science advantages for adding a K or Ks filter (lambda_c 2.15 microns) and propose to extend the wavelength coverage for WFIRST into the K-band, where the gains of going to space are much more pronounced than at shorter wavelengths.

Continuing the EURONEAR data-mining projects, we developed the VIMP tool to search for Virtual Impactor asteroids (VIs) using our Mega-Precovery archival image collection. VIMP identifies candidate images probably holding VIs which are prioritised and scrutinised by human reducers. First, we applied VIMP to the Blanco-DECam archive (about 300,000

We present time-resolved 10.4 m Gran Telescopio Canarias and 4.2 m William Herschel Telescope intermediate resolution spectroscopy of the X-ray transient MAXI J1820+070 (=ASASSN-18ey) obtained during its decline to the quiescent state. Cross-correlation of the 21 individual spectra against late-type templates reveals a sinusoidal velocity