CERN Axion Solar Telescope (CAST) solar tracking

Timelapse video of the CERN Axion Solar Telescope (CAST) following the Sun in the morning and in the evening. CAST is an experiment to search for hypothetical particles called “axions“. These have been proposed by some theoretical physicists to explain why there is a subtle difference between matter and antimatter in processes involving the weak force, but not the strong force. If axions exist, they could be found in the centre of the Sun and they could also make up invisible dark matter. CAST is searching