JHI PhD student Alexia Lopez featured in the BBC Four documentary “Secrets of Size: Atoms to Supergalaxies“, episode 2 “Going Big“, presented by Prof. Jim Al-Khalili.
Alexia discussed her discovery of A Giant Arc on the Sky with Jim. The Giant Arc appears as an enormous, nearly symmetrical, crescent of galaxies in the remote universe. It is approximately 3.3 billion light-years across (1/15th the radius of the observable universe), at a distance from us of about 9.2 billion light-years. The Giant Arc adds to an accumulating set of (cautious) challenges to the Cosmological Principle, which is the foundation of our theoretical understanding of cosmology and the universe.
The programme was broadcast on BBC Four on 23 May 2022. It should be available on BBC iPlayer for about one year following the broadcast.