Read article 'INTEGRAL sees gamma rays from black-hole jets'
A detailed analysis of observations of Cygnus X-1 by ESA’s International Gamma-ray Astronomical Laboratory (INTEGRAL) has found strongly polarized gamma-ray emission. The polarization sugge...
Read article 'PAMELA data challenge theory for cosmic-ray acceleration'
The satellite experiment Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) has reported finding differences between the shapes of the energy spectra of protons and heliu...
Read article 'Superfluidity at work in neutron star’s core'
The rapid decline in temperature of a young neutron star in the supernova remnant Cassiopeia A (Cas A) suggests superfluidity and superconductivity at its core. This conclusion, based on observat...
Read article 'Did Hubble find the most distant galaxy?'
The Hubble Space Telescope has been pushed to its limits to find a galaxy candidate at a record distance of 13.2 thousand million light-years. The tiny, dim object observed by Hubble could be a compac...
Read article 'Fermi sees giant bubbles in the Milky Way'
The Fermi gamma-ray space telescope has detected high-energy emission from two giant lobes on both sides of the plane of the Galaxy. This unexpected finding suggests that the Milky Way was more active...
Read article 'Planck reveals a stellar first year'
The first results from Planck are already providing new insights into astrophysics.
Read article 'The origin of cosmic rays'
Fine structure in the energy spectrum provides new clues.
Read article 'Hubble: A Journey Through Space and Time'
Jesse Karjalainen reviews in 2010 Hubble: A Journey Through Space and Time.
Read article 'Massive neutron star can’t be exotic matter'
The most precise determination yet of the mass of a heavy neutron star in a binary system has important implications on its matter content. With a mass twice that of the Sun, the millisecond-pulsar J1...
Read article 'Exoplanet hunters find rich planetary systems'
The time when isolated extrasolar planets were discovered is over, with the detection of two entire systems of six and possibly even seven planets orbiting nearby stars. These recent discoveries by tw...
