View Single Post
  #8  
Old October 25th 18, 06:49 PM posted to sci.astro.amateur
Gerald Kelleher
external usenet poster
 
Posts: 1,551
Default Mercury rocket at the mercy of solar gravity well

What makes theorists dull and boring is their inability to appreciate how the terms 'average' and 'constant' became interchangeable when applied to the planet's rotation and the attendant Lat/Long system. Even demonstrating that the Lat/Long system is an outrigger of the calendar framework like the more recent RA/Dec reckoning doesn't register with these people.

The rotation of the Earth is anchored to noon (there is nothing comparable between sunset to sunrise) so in dynamical terms a location and their meridian is exactly half way between the circle of illumination at natural noon regardless of latitudinal speed of hemispherical season.

The neat trick of substituting the average 24 hour day for constant rotation over 360 degrees is such an exquisite experience for those who can rise to the emergence of timekeeping via the first annual appearance of a star as an orbital marker for the position and orbital motion of the Earth.

The people who bypassed the Sun as an anchor for rotation made a mistake. All generations of people find it impossible to believe they are inferior to previous generations but in this case those who can bypass the error and return to a stable foundation for both timekeeping and the astronomy of cause and effect will be doing themselves and the wider world a favour.