Read article 'Survey reveals edge of dark-matter halos'
Results show that the density of dark matter in a halo does not gradually fall off with distance, as might be expected, but instead exhibits a sharp edge.
Read article 'LHCb brings cosmic collisions down to Earth'
The LHCb collaboration has generated high-energy collisions between protons and helium nuclei similar to those that take place when cosmic rays strike the interstellar medium.
Read article 'Dark-matter surprise in early universe'
A surprising result at the Max Planck Institute for Extraterrestrial Physics in Germany suggests that dark matter was less influential in the early universe than it is today.
Read article 'Editor’s note'
After 13 years as the Courier’s Astrowatch contributor, astronomer Marc Türler is moving to pastures new.
Read article 'Euclid to pinpoint nature of dark energy'
Due for launch in 2020, ESA’s Euclid probe will track galaxies and large areas of sky to find the cause of the cosmic acceleration.
Read article 'Gravitational lens challenges cosmic expansion'
An international group of astronomers has made an independent measurement of how fast the universe is expanding.
Read article 'WIMP no-show in gamma-ray background'
A possible additional contribution from WIMP annihilation could not be identified, using NASA’s Fermi Gamma-ray Space Telescope.
Read article 'Compact star hints at vacuum polarisation'
Astronomers may have found the first observational indication of a strange quantum effect called vacuum birefringence.
Read article 'The dawn of a new era'
Gravitational waves open a profound new vista on nature.
Read article 'General relativity at 100'
Testing Einstein’s masterpiece with ever increasing precision.
