The Hubble Deep Field and the Dark Matter Paradigm

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In the mid 90s, a new type of telescope called Hubble was launched. It allowed scientists to see how galaxies were evolving at the time. But it also revealed that dark matter had been wrong about when stars form. James web will help us learn more about this and other types of telescopes are coming up with better tools for analysing data.

It's somewhat amazing that cosmology, the study of the universe as a whole, can make any progress at all. But it has, especially so in recent decades. Partly that's because nature has been kind to us in some ways: the universe is quite a simple place on large scales and at early times. Another reason is a leap forward in the data we have collected, and in the growing use of a powerful tool: computer simulations. I talk with cosmologist Andrew Pontzen on what we know about the universe, and how simulations have helped us figure it out. We also touch on hot topics in cosmology (early galaxies discovered by JWST) as well as philosophical issues (are simulations data or theory?).

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Blog post with transcript: https://www.preposterousuniverse.com/podcast/2023/06/19/240-andrew-pontz…and-the-universe/

Andrew Pontzen received his Ph.D. in astronomy from the University of Cambridge. He is currently Professor of Cosmology at University College London. In addition to his research in cosmology, he frequently writes popular articles and appears in science documentaries. His new book is The Universe in a Box: Simulations and the Quest to Code the Cosmos.

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