Behind the Paper
The real stories behind the latest research papers, from conception to publication, the highs and the lows.
A hidden population of high-redshift double quasars unveiled by astrometry
A new technique leads to the discovery of two closely separated pairs of supermassive black holes in the early universe.
Ultra-high-energy gamma rays in the Cygnus Cocoon
What is the source of the highest-energy cosmic rays in our Galaxy? We report here the observation of the ultra-high-energy gamma-ray emission from a stellar superbubble in the Cygnus region, powered by the massive stellar complex called Cygnus OB2 in an attempt to answer this question.
