Backgrounds
Youve probably heard of the cosmic microwave background, but it doesnt stop there. The as-yet-undetectable cosmic neutrino background is out there waiting to give us a view into the first seconds...
View ArticleFermi telescope measures cosmic 'fog' produced by ancient starlight
(Phys.org)—Astronomers using data from NASA's Fermi Gamma-ray Space Telescope have made the most accurate measurement of starlight in the universe and used it to establish the total amount of light...
View ArticleAstronomers measure nearby Universe's 'cosmic fog'
Researchers from the Laboratoire Leprince-Ringuet (CNRS/École Polytechnique) have carried out the first measurement of the intensity of the diffuse extragalactic background light in the nearby...
View ArticleMost distant blazar is a high-energy astrophysics puzzle
(Phys.org) —Blazars are the brightest of active galactic nuclei, and many emit very high-energy gamma rays. New observations of the blazar known as PKS 1424+240 show that it is the most distant known...
View ArticleDetection of the cosmic gamma ray horizon: Measures all the light in the...
(Phys.org) —How much light has been emitted by all galaxies since the cosmos began? After all, every photon (particle of light) from ultraviolet to far infrared wavelengths ever radiated by all...
View Article
More Pages to Explore .....