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
habitability supernovae dark matter cosmology planet formation theory galaxies accretion transits observations galaxy evolution solar system exoplanets AGN astronomical methods Kepler radio astronomy planetary science astrophysics astronomy spectroscopy stars star formation protoplanetary disks instrumentation black holes interstellar medium binary stars simulations stellar evolution