Hi Alex! Great video, very informative! Greetings from Russia (Museum of timekeeping and clocks in Moscow)!
@user-hn1wp3lh2k14 күн бұрын
Прекравное видео! Спасибо!
@grottonisred65417 ай бұрын
This was brilliant. Extremely informative and straight to the point. The clockmakers of old were very intelligent and coupled with a couple of skilled hands produce great works which are still running 200 years later.
@munnerlyn38 ай бұрын
Very well done. I would love to have the center and clock on the right as they are original but the clock on the left is ok too.
@automaticgainsay2 жыл бұрын
This was fascinating and very well-presented! Thank you very much!
@SuperNathan906 ай бұрын
wasn't there railway time and sundial time. and they both were out by 15 minutes or something ?
@ian_simbotin
6 ай бұрын
Yeah, there was\is a lot of something..... Sundials were used to calibrate the clocks according to solar time. But precisely because pendulum clocks acquired a huge jump in precision (ahem, accuracy not just precision) they had to drop the sundials and the solar time. So, in order to turn that amazing precision into accuracy, they started to calibrate the clocks using the stars (instead of the Sun). The jargon is "sidereal time". These complications stem from the fact that we orbit the Sun on a slightly eccentric oval (an ellipse instead of a circle) and also Earth's axis of spin is tilted relative to the plane of the orbit. As clocks became really good, they were able to measure that the solar day, i.e., noon-to-noon, varies by up to 15 minutes or so, depending on the seasons\months.
Пікірлер: 7
Hi Alex! Great video, very informative! Greetings from Russia (Museum of timekeeping and clocks in Moscow)!
Прекравное видео! Спасибо!
This was brilliant. Extremely informative and straight to the point. The clockmakers of old were very intelligent and coupled with a couple of skilled hands produce great works which are still running 200 years later.
Very well done. I would love to have the center and clock on the right as they are original but the clock on the left is ok too.
This was fascinating and very well-presented! Thank you very much!
wasn't there railway time and sundial time. and they both were out by 15 minutes or something ?
@ian_simbotin
6 ай бұрын
Yeah, there was\is a lot of something..... Sundials were used to calibrate the clocks according to solar time. But precisely because pendulum clocks acquired a huge jump in precision (ahem, accuracy not just precision) they had to drop the sundials and the solar time. So, in order to turn that amazing precision into accuracy, they started to calibrate the clocks using the stars (instead of the Sun). The jargon is "sidereal time". These complications stem from the fact that we orbit the Sun on a slightly eccentric oval (an ellipse instead of a circle) and also Earth's axis of spin is tilted relative to the plane of the orbit. As clocks became really good, they were able to measure that the solar day, i.e., noon-to-noon, varies by up to 15 minutes or so, depending on the seasons\months.