Units for measuring time have been realised through the rotation of the Earth – the day. As the precision of clocks improved, it was found that the length of the day was variable. An astronomical solution was to use solar system orbits instead of Earth rotation to define the unit. This resulted in the adoption of Ephemeris Time in the 1950s, which defined the second inherited by today’s atomic clocks. It has also left a problem with ‘leap seconds’ which remains to be solved.
This talk will be delivered by Eddie Yeadon. Eddie obtained his PhD in physics from Manchester University. His career focused on optics and optical engineering, mostly relating to the printing industry.
THIS EVENT IS OPEN TO MEMBERS OF THE FLAMSTEED ASTRONOMY SOCIETY ONLY.
Please do not book a place on this event if you are not a member of the society. Your booking will be cancelled if your name does not appear on our membership database.