Astrophysics and cosmology Archives – Page 30 of 58

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...

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 ...

XMM-Newton sees fast-spinning white dwarf

Using observations by ESA’s Newton X-ray multimirror satellite, XMM-Newton, a group of Italian astronomers has derived the characteristics of a peculiar binary system consisting of a white dwarf...

Cosmology

Massimo Giovannini reviews in 2015 Cosmology by Steven Weinberg.

Telescopes pin down location of cosmic accelerator

Teams have joined forces with astronomers to reveal the precise location of particle acceleration in the nearby giant radio galaxy M87.

Galactic positrons are not from dark matter

A new study on the propagation of positrons in the galaxy suggests that dark-matter annihilation or decay is not required to account for gamma-ray observations by ESA’s INTEGRAL satellite. It sh...

Cosmic leptons challenge dark-matter detection

Recent data favour an astrophysical explanation for cosmic-ray features.

Playing with Planets

Herbi Dreiner reviews in 2009 Playing with Planets.

The ESA Planck spacecraft heads off to its final destination after successful launch

Planck, ESA's new spacecraft to map the cosmic microwave background, successfully took its first steps into space on 14 May when it was launched together with the far-infrared space telescope Hersche...