62: The Cosmic Sponge
from syzygy Hosted by Chris Stewart
Come see us live at the Northern Podcast Festival in Hull, 16 May Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York. On the web: syzygy.fm | Twitter: @syzygypod Things we talked about in this episode: Perseverance, the latest robot on Mars The Observable Universe The Great Attractor The Zone of Avoidance The 2dF Galaxy Redshift Survey SDSS, the Sloan Digital Sky Survey Galaxy Zoo Fly through the Universe! The Millennium Simulation Project Zoom into the Cosmic Sponge Fly through the Millennium Simulation Universe The Illustrious Simulation Illustris simulation video Dark Emulator
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What this episode covers
Space is big, as Douglas Adams so succinctly put it. But how big? And what does the Universe look like when you see it at those scales. The structure of the large-scale cosmos is amazing — beyond galaxies, beyond clusters of galaxies, we're talking super-mega-ludicrous clusters. Clusters of clusters. Madness. In the last 20 years two advances have given us a glimpse of the Universe at these largest scales: surveys of galaxies that map out the cosmos in fine detail, and stupendously complex simulations on powerful supercomputers. At the heart of it all, responsible for the intriguing filaments and walls and voids — the cosmic sponge itself — we find an old, mysterious, dark friend.
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