Brains Matter episode 67 - The Milky Way's missing spiral arms

In astronomical news recently - it was announced that the Milky Way has two less arms than originally thought. How? Why? And what’s a galaxy to start with? To answer these questions, I talk to Dr Pamela Gay, an astronomer from Southern Illinois University Edwardsville, who tells us all why this is so.

Brains Matter is a podcast out of Australia, which features stories on science, curiosities and general knowledge. It also features interviews with various experts in science and other interesting areas.

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