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Bizarre Universe

It seems we live in a bizarre Universe. One of the greatest mysteries in the whole of science is the prospect that 75% of the Universe is made up from a mysterious known as ‘Dark Energy’, which causes an acceleration of the cosmic expansion. Since a further 21% of the Universe is made up from invisible ‘Cold Dark Matter’ that can only be through its gravitational effects, the ordinary atomic matter making up the rest is apparently only 4% of the total cosmic budget.

These require a shift in our perception as great as that made after Copernicus’s that the Earth moves around the Sun. This lecture will start by reviewing the chequered history of Dark Energy, not only since Einstein's proposal for a similar entity in 1917, but by tracing the concept back to Newton's ideas. This lecture will the current evidence for Dark Energy and future surveys in which UCL is heavily involved: the "Dark Energy Survey", the Hubble Space Telescope and the proposed Euclid space mission.

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