Episode Details

The cosmic microwave background is the luminous echo of the primordial explosion, the Big Bang — literally the oldest light in the Universe. Exquisitely precise measurements of this light have allowed astronomers to achieve what might seem impossible: weighing the universe, and thereby establishing the geometry of space.

Uploaded 10-06-26

This lecture will explain the physics of the cosmic microwave background and the challenges in understanding where our universe came from.

A lecture by Roberto Trotta, Visiting Professor of Cosmology 4 November

The transcript and downloadable versions of the lecture are available from the Gresham College website:
https://www.gresham.ac.uk/lectures-and-events/weighing-the-universe

Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.

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