Read article 'Fermi limits the intergalactic magnetic field'
Astronomers have found evidence that the magnetic field between galaxies cannot be negligible. Otherwise, a blazar observed by the High Energy Stereoscopic System (HESS, CERN Courier January/February ...
Read article 'Astronomers miss 90% of distant galaxies'
The rate of star formation in the early universe is mainly deduced based on a specific hydrogen-emission line observed in remote galaxies. It was already suspected that this Lyman-α line is stron...
Read article 'Gravitational lensing constrains cosmology'
When two sources at various distances happen to be aligned on the line of sight, the gravitational field of the nearer galaxy distorts the image of the distant galaxy into multiple arc-shaped images (...
Read article 'CAST’s first decade of solar-axion research'
The ingenious project based on X-ray astronomy, particle physics and an LHC magnet.
Read article 'SN 2009bb: where are the gamma rays?'
Long-duration gamma-ray bursts are associated with peculiar supernova explosions and a long-lived radio afterglow emission has been detected for some of them. So the discovery of relativistic radio ej...
Read article 'Cosmic rays, climate and the origin of life'
Cosmic rays may not influence cloud cover, but they may have a role in the phenomenon of lightning.
Read article 'AGILE and Fermi see a flaring microquasar'
The two currently operating high-energy gamma-ray satellites have both detected Cygnus X-3 (Cyg X-3) during episodes of strong radio flaring. These first detections of a genuine microquasar in our gal...
Read article 'VERITAS observes the origin of cosmic rays'
The detection of very-high energy (VHE, E> 100 GeV) gamma-rays from the starburst galaxy Messier 82 (M82) by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) may...
Read article 'Can invading black holes explain GRBs?'
X-ray observations of gamma-ray bursts (GRBs) by the Swift satellite suggest that the central engine can be active for up to a few hours. A new theoretical study shows that this is difficult to explai...
Read article 'AMS gets its slot on a space shuttle in 2010'
AMS-02, the experiment that will seek dark matter, missing matter and antimatter in space aboard the International Space Station (ISS), has recently received the green light to be part of the STS-134 ...
