In today’s astrobite, we discuss the opacity of the Universe to high energy photons. The cosmic gamma-ray horizon, constrained by the authors of this paper, is a measure of this opacity, a cosmological probe and means of estimating blazar redshifts.
Follow us on Twitter
Like us on Facebook
More Posts About
exoplanets astronomical methods interstellar medium theory transits stellar evolution instrumentation stars planet formation galaxies simulations observations star formation accretion binary stars AGN astrophysics solar system habitability dark matter planetary science cosmology statistics galaxy evolution spectroscopy supernovae astronomy radio astronomy Kepler black holes