A microwave telescope at the South Pole has for the first time captured a particular polarization signal in the cosmic microwave background that arises from gravitational lensing by intervening matter.
New results from the Fermi Gamma-Ray Space Telescope, the most precise to date in the energy range to , should help resolve whether cosmic rays composed of the lightest charged particles, i.e., electrons and positrons, come from dark matter or some other astrophysical source.
Physics2, 10 (2009) – Published February 2, 2009
Many cosmologists believe that antiprotons in cosmic rays come from the annihilation of dark matter. Data from the PAMELA experiment on board a Russian satellite provide an important test of this possibility.
The universe we see today is the result of mass-energy fluctuations during the rapid inflationary expansion that followed the big bang. A new approach to analyzing those fluctuations brings theory into better alignment with observational data.