Markus Kuhn writes: "The varying length of the day has been known for centuries but only became a practical concern (outside astronomy) with the invention of atomic clocks in the 1950s."
Is this true? I though it was discovered only in the 20th century? >From the context he refers to mean solar day, I understand. On Fri, Jan 9, 2015 at 2:24 PM, Tom Van Baak <[email protected]> wrote: > They were wise enough to ask Markus to write it; a nice balance between > popular and technical. They were kind enough to ask permission to use a > cesium clock leap second photo from my web site. "Not something you see > every day" indeed! > > https://theconversation.com/an-extra-second-on-the-clock-why-moving-from-astronomic-to-atomic-time-is-a-tricky-business-35970 > > Markus -- your LOD plot ends in 2011? > > /tvb > > _______________________________________________ > LEAPSECS mailing list > [email protected] > https://pairlist6.pair.net/mailman/listinfo/leapsecs > _______________________________________________ LEAPSECS mailing list [email protected] https://pairlist6.pair.net/mailman/listinfo/leapsecs
