rss-bridge 2025-10-04T23:00:00+00:00

The Aftermath of Cosmic Collisions with Prof. Geraint Lewis (446)

In this episode, friend of the show Geriant Lewis, Professor of Astrophysics at the Sydney Institute for Astronomy within the University of Sydney, joins us to unpack a fascinating New Scientist article theorising on how a strange line of dwarf galaxies may have formed. We explore how high-speed collisions between dwarf galaxies can scatter gas and stars across space, sometimes giving rise to entirely new tidal galaxies. Geraint explains the latest thinking on where these dwarf galaxies come from and how these cosmic smash-ups might even shed light on one of the biggest mysteries in physics: the true nature of dark matter. www.geraintflewis.com/ Linkedin: Geriant Lewis Bluesky: cosmic_horizons

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Shirtloads of Science

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- The Aftermath of Cosmic Collisions with Prof. Geraint Lewis (446)

The Aftermath of Cosmic Collisions with Prof. Geraint Lewis (446)

Oct 4, 2025

We explore how high-speed collisions between dwarf galaxies can
scatter gas and stars across space, sometimes giving rise to
entirely new tidal galaxies. Geraint explains the latest thinking
on where these dwarf galaxies come from and how these cosmic
smash-ups might even shed light on one of the biggest mysteries in
physics: the true nature of dark matter.

www.geraintflewis.com/

Linkedin: Geriant Lewis

Bluesky: cosmic_horizons

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About the Podcast

Dr Karl’s a curious optimist – a great combination for a science lover. Join him and his guests for weird facts, amazing conversation and remember, it’s never too late for a happy childhood.
https://drkarl.com/

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[Original source](https://shirtloadsofscience.libsyn.com/with-prof-geriant-lewis-446)