Affiliation:
1. Department of Applied Science and Technology, Polytechnic University of Turin , Turin 10129, Italy
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” (ΛCDM) model. Graphical representations are plotted in terms of both conformal and proper coordinates as an aid to understand the propagation of light in the expanding universe at various epochs.
Publisher
American Association of Physics Teachers (AAPT)
Subject
General Physics and Astronomy
Reference17 articles.
1. James Webb Space Telescope releases dazzling first science images,2022
2. Visual horizons in world-models;Mon. Not. Roy. Astron. Soc.,1956
3. Hubble sphere and particle horizons;Astrophys. J.,1991
4. Lost horizons;Am. J. Phys.,1993
5. Evolution of the cosmological horizons in a concordance universe;J. Cosmol. Astropart. Phys.