A huge team of astronomers — and their even-huger team of tiny, fibre-obtic-wielding robots — are zeroing in on one of the great questions of cosmology: just what the heck is going on with Dark Energy? We know the Universe is expanding. Apparently, it's expanding faster. But maybe it is expanding faster, slower? Tiny robots measuring breathtakingly-huge cosmic bubbles may give us an answer.

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Syzygy is produced byChris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

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Some of the things we talk about in this episode:

• Announcement of the DESI results

• A good video about the results

• The DESI home page

• Dark Energy

• Heat Death or Big Rip

• The 2011 Nobel Prize for Physics

• BAO bubbles