Our Universe is, at the very least, 100 billion light years -- or 1,000,000,000,000,000,000,000,000,000 metres -- across. But where does this number come from? How can we measure the distance to even the nearest star when we've never visited it? And, at a time when cosmologists reckon our Universe may be just one of many in a giant multiverse, will we ever truly grasp the magnitude of what's out there? Join us on a voyage into the farthest reaches of space and time. Dr Andrew Pontzen is a cosmologist at University College London. His research, for which he was awarded the Royal Astronomical Society's 2016 Fowler Award, focuses on the way that galaxies and other structures have formed in our Universe. He is also an experienced communicator of science on radio, TV and at events across the UK.
This talk is particularly suitable for ages 11+.
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Event image by Nasa via Wikimedia