Astrophysics and cosmology Archives – Page 25 of 59

ESO and CERN: a tale of two organizations

A look back at the birth of ESO 50 years ago.

Auger determines pp inelastic cross-section at √s = 57 TeV

The Pierre Auger Observatory was constructed with the aim of understanding the nature and characteristics of these particles using precise measurements of cosmic-ray-induced extensive air showers up t...

Dark-matter filament binds galaxy clusters

Numerical simulations of structure formation in the universe reveal how clusters of galaxies form at the intersection of dark-matter filaments. The presence of such a filament connecting the galaxy cl...

The Milky Way’s dark-matter halo reappears

Back in April, a study of the motion of hundreds of stars in the Milky Way found no evidence of a massive dark-matter halo (CERN Courier June 2012 p11). The finding came as a surprise and did not long...

A discovery of cosmic proportions

What Victor Hess found out when he took to the skies in 1912.

Domenico Pacini and the origin of cosmic rays

A forgotten pioneer of the early days of cosmic-ray research.

Studies of ultra-high-energy cosmic rays look to the future

A symposium at CERN discussed the challenges in detecting extreme events.

ALICE looks to the skies

ALICE is one of the four big experiments at CERN’s LHC. It is devoted mainly to the study of a new phase of matter, the quark–gluon plasma, which is created in heavy-ion collisions at very ...