The BICEP2 collaboration reports the detection of -mode polarization of the cosmic microwave background—a signal that might originate from gravitational waves created by inflation during the very earliest moments in the evolution of our Universe.
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.