The so-called extreme trans-Neptunian objects (ETNOs) are orbiting the Sun at heliocentric distances larger than 150 AUs, and their discovery a decade ago was soon recognized as a turning point in our knowledge of the outer Solar System. The currently tally stands at 21 ETNOs, and only one, Sedna, has been spectroscopically observed. In the last years several studies have suggested that the dynamical properties of the ETNOs could be better explained if one or several planets of several Earth masses are orbiting the Sun at hundreds of AUs. In 2016, Brown and Batygin used the orbits of seven

The first billion years of cosmic history represents the final frontier in assembling a coherent physical picture of early galaxy formation, and a remarkable progress in this area has been made in the last few years. We have carried out a detailed analysis of a gravitationally lensed galaxy A2744_YD4 at z = 8.38 behind the massive galaxy cluster Abell 2744. The photometric redshift of about 8, estimated from HST, VLT and Spitzer data, was confirmed by the detection of the Ly_alpha line at a redshift of z=8.38 in a deep VLT X-SHOOTER spectrum. The follow-up observations with the Atacama Large

The Instituto de Astrofísica de Canarias (IAC) and the Gran Telescopio Canarias (GTC) have edited an astronomical calendar in poster format (only in Spanish) illustrated with the image of the "Fireworks" Galaxy , NGC 6946, taken with the OSIRIS instrument on the GTC at the Roque de los Muchachos Observatory (Garafía, La Palma). Credit: GTC team/ Daniel López/ IAC. Design: Ramón Castro and UC3 (IAC). You can pick up free copies of this calendar in the coming days, until stocks run out, at Reception in the IAC Headquarters, La Laguna (from 8.00h to 18.00h) and from the Astrophysics Centre, La

Giuseppe Bono, astrophysicist and associate professor of the Department of Physics at the Università degli Studi di Roma "Tor Vergata" (Italy), is currently Chair of the E-ELT Project Science Team, the future 39m European Extremely Large Telescope, intended to be the largest optical-infrared telescope in the world. Interested in the evolution of stars, pulsations and stellar populations, as well as cosmological parameters based on these objects, he has visited the IAC several times, both as a researcher and professor at the Canary Islands Winter School of Astrophysics that has been annually

Any of the 2000 asteroids potentially dangerous for the Earth could impact onto our planet in the future with disastrous consequences. “Cazasteroides” makes available to the general public a tool to collaborate in protecting us agains these objects.

Black holes, those "cosmic ghosts" on which literature and cinema have based many of their stories, were no longer so mysterious when Phil Charles, Professor of Astronomy at the University of Southampton (United Kingdom), found in 1992, along with the IAC researcher Jorge Casares, the first empirical evidence of their existence in the Milky Way. From that moment, everything changed in the field of High Energy Astrophysics. Even today, he continues to investigate these binary systems, although he is also interested in all cosmic objects that are X-ray sources. Linked to the Instituto de