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Prof. Michael Murphy

Quasars - the brightest constant sources of light in the Universe - can be seen at such large distances that they show us much of the intervening Universe. The absorption lines imprinted onto the quasar light as it travels to Earth reveal many details about galaxies which are too dim to be imaged directly. This is my primary field of study. Interestingly, the quasar light also contains signatures of fundamental physical processes in the distant Universe. In particular, it provides values for some of the fundamental constants and so allows to see whether these supposedly immutable numbers have changed throughout the Universe's history.

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