We show herein that a proto-cluster of Lyα emitting galaxies, spectroscopically confirmed at redshift 6.5, produces a remarkable number of ionising continuum photons. We start from the Lyα fluxes measured in the spectra of the sources detected spectroscopically. From these fluxes we derive the ionising emissivity of continuum photons of the proto-cluster, which we compare with the ionising emissivity required to reionise the proto-cluster volume. We find that the sources in the proto-cluster are capable of ionising a large bubble, indeed larger than the volume occupied by the proto-cluster

José Lull knows a lot about the royal Egyptian tombs of the Third Intermediate Period and the Late Period. In fact this was the theme of the doctoral thesis – published as a monograph by Oxford University Press- of this Egyptologist, with degree at the University of Tübingen (Germany) and a doctorate from the University of Valencia. He is presently at the Autonomous University of Barcelona, and is also an expert in the astronomy of ancient Egypt. He showed this recently at the Instituto de Astrofísica de Canarias, where he has been collaborating with Juan Antonio Belmonte, archeoastronomer

Elliptical and lenticular galaxies (collectively called early-type galaxies) are the oldest and most massive galaxies in the Universe. These galaxies were built up rapidly (in less than thousand million years) and therefore, their stars are generally ancient and cool, meaning that they mainly shine in the optical and infrared spectral ranges. However, any hot young stars that might be present are difficult to detect in these spectral ranges. The study, based on 30,000 early-type galaxy spectra from the Sloan Digital Sky Survey BOSS has analysed the UV spectral range to detect the young