Cosmological horizons

Abstract

The recently unveiled deep-field images from the James Webb Space Telescope have renewed interest in what we can and cannot see of the universe. Answering these questions requires understanding the so-called "cosmological horizons" and the "Hubble sphere". Here we review the topic of cosmological horizons in a form that university physics teachers can use in their lessons, using the latest data about the so-called standard "Lambda Cold Dark Matter" ($\Lambda$CDM) model. Graphical representations are plotted in terms of both conformal and proper coordinates as an aid to understanding the propagation of light in the expanding universe at various epochs.

References in corpus (4)

• Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the Universe
• Evolution of the Cosmological Horizons in a Universe with Countably Infinitely Many State Equations
• Evolution of the Cosmological Horizons in a Concordance Universe
• Fundamental Aspects of the Expansion of the Universe and Cosmic Horizons