Astrophysics and cosmology Archives – Page 7 of 58

Star-forming galaxies rule gamma-ray sky

The diffuse photon background that fills the universe does not limit itself to the attention-hogging cosmic microwave background.

Having the right connections is key

SKAO director-general Philip Diamond describes how the world's largest radio telescope went from concept to construction.

BICEP crunches primordial gravitational waves

The new analysis significantly improve the upper bound on the strength of gravitational waves produced during the epoch of inflation.

Cosmic-ray anisotropy probed across 10 decades in energy

This week, at the 37th International Cosmic Ray Conference, space- and ground-based detectors unveiled new cosmic-ray anisotropy measurements from GeV to tens of EeV.

Astroparticle theory in rude health

The European Consortium for Astroparticle theory held its first annual symposium in May, bringing together hundreds of theoretical physicists across Europe.

Mountain observatory nets PeV gamma rays

Recent detection from LHAASO provides the first clear evidence of the presence of galactic “pevatrons”.

Exploring the Hubble tension

Cosmologist and theoretical physicist Licia Verde discusses the current tension between early- and late-time measurements of the expansion rate of the universe.

Accelerators meet gravitational waves

Gravitational waves crease and stretch the fabric of spacetime as they ripple out across the universe, potentially causing observable effects on beams in storage rings.