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Comment Re:Better way (Score 1) 289

DST aligns it better. Noon shifts through the year because the Earth orbit is not completely round.
What we see as a day is the sum of two effects:
1. The rotation of the earth around it's axis. This takes about 23 hours and 56 minutes. Understand it as "relative to the stars in the background". It is called sidereal time.
2. Our orbit around the sun. This adds 4 minutes to each day. If the earth would not rotate relative to the stars in the background this would still cause one "day" per year.
Total is approximately 24 hours.

The rotation around our axis is relatively constant. Sufficiently constant for this.
The orbital speed is not constant. The orbit is not round, there is a point where the planet is closer to the sun. The closer the earth is to the sun the faster it goes.
The faster the earth goes the more degrees per hour the sun movement by the day-caused-by-our-orbit is.
This causes noon to shift approximately 1 hour during the day.
DST corrects for that.

Having said that: we should kill DST. The lost productivity it causes is enough reason.

On mercury this effect is so strong that the sun can be seen going backwards during a part of the day(if there was an observer there).

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