Re: Birthday calculator


"Dave W." <nobody@xxxxxxxxxxx> wrote in message
news:87pa34l2acuj7psqh8ldv5co35bn3dvkpd@xxxxxxxxxx
|
| >| >| >
| >| >| But the fact remains that succesive perihelia or aphelia of the
earth
| >| >| are not separated by one tropical year, but an interval of up to a
| >| >| couple of days different, due largely to the correction from
| >| >| earth-moon barycentre to the centre if the earth.
| >| >|
| >| >| Dave W.
| >| >
| >| >
| >| >The fact remains that you must produce the numbers if you want to
| >| >convince me that perihelion/aphelion wanders by "up to a couple" of
| >| >degrees, a day being approximately a degree. Assertion and screaming
| >| >"fact" (when you have no clue what a fact is) carries no weight.
| >| >
| >| >This may help you:
| >| > http://en.wikipedia.org/wiki/Orbital_eccentricity
| >| >
| >| >"The eccentricity of the Earth's orbit is currently about 0.0167"
| >| >
| >| > http://www.androcles01.pwp.blueyonder.co.uk/Orbit/Orbit.xls
| >| >Feel free to change the data in the yellow boxes, say 0.0167 for the
| >| >eccentricity and 366 for the number of points.
| >| >
| >| >The FACT remains that you are handwaving and not proving, Mr. Nobody
| >| >at Nowhere.
| >|
| >| Here are some facts (which you could have checked yourself, but that
| >| might mean having to admit you were wrong).
| >|
| >| From one of many sources:
| >| http://brahms.phy.vanderbilt.edu/a201/usno_earth_perihelia.html
| >|
| >| 2008
| >| Perihelion Jan 3 00
| >| Aphelion July 4 08
| >|
| >| 2009
| >| Perihelion Jan 4 15 Interval since last: 367d 15h
| >| Aphelion July 4 02 Interval since last: 364d 18h
| >|
| >| 2010
| >| Perihelion Jan 3 00 Interval since last: 363d 09h
| >| Aphelion July 6 11 Interval since last: 367d 09h
| >|
| >| 2011
| >| Perihelion Jan 3 19 Interval since last: 365d 19h
| >| Aphelion July 4 15 Interval since last: 363d 04h
| >|
| >| 2012
| >| Perihelion Jan 5 00 Interval since last: 366d 05h
| >| Aphelion July 5 03 Interval since last: 365d 12h
| >|
| >| Now try and knock some holes in that lot.
| >|
| >| Dave W.
| >
| >One list, copied from another somewhere?
| > http://aa.usno.navy.mil/data/docs/EarthSeasons.php
| >Your data has even got the same colour font!
| >I don't have to knock holes in it, they are already big enough to drive
| >a truck through. Is that your idea of "one of many sources"?
| >I don't care if you have 20,000 copies of the same list, any error will
be
| >in all of them.
| >
| >Where are the measurements, boy?
| >
| >The FACT remains that you are handwaving and not proving, Mr. Nobody
| >at Nowhere who might have to admit he's wrong.
| >
| >Look, sonny, I don't have to admit I'm wrong, you have to prove you
| >are right. And you can't.
|
|
| OK you supply your list of perihelion and aphelion dates and let us
| know the source. In the meantime:
|
| Black = White
| Prove.
|
| Dave W.

You still do not understand, do you?
I did not claim black = white, you did. You now have the burden of proving
it.

I claim black = black, the proof of which is given in the definition of "=".

I did not claim periapsis or apoapsis wanders by as much as a couple of
degrees (days) a year, you did.
Specifically you claimed:
" But the fact remains that succe[s]sive perihelia or aphelia of the earth
are not separated by one tropical year, but an interval of up to a
couple of days different, due largely to the correction from
earth-moon barycentre to the centre if [of] the earth."
I challenge that so-called "fact".
You now have the burden of proving your claim. So far all you've
said is "this web page says so and I believe it", and that simply isn't
good enough a proof to me. You may be gullible enough to believe it,
I'm not.

I'll give you a hint:
There is only one point where perihelion can be, not two or more.
The point of closest approach to the Sun as modified by the Moon
will be at Full Moon or Lunar Eclipse.
Now THINK.

--
Why did Einstein say
the speed of light from A to B is c-v,
the speed of light from B to A is c+v,
the "time" each way is the same?

Androcles

http://www.androcles01.pwp.blueyonder.co.uk/


.

Relevant Pages

  • Re: Birthday calculator
    ... |>|>| earth-moon barycentre to the centre if the earth. ... |>|>The FACT remains that you are handwaving and not proving, ... There is only one point where perihelion can be, ... The point of closest approach to the Sun as modified by the Moon ...
    (sci.astro)
  • Re: Birthday calculator
    ... |>| earth-moon barycentre to the centre if the earth. ... at Nowhere who might have to admit he's wrong. ... OK you supply your list of perihelion and aphelion dates and let us ...
    (sci.astro)
  • Re: Precession of the Equinoxes
    ... What it Means for Life on Earth" by Tim Flannery (Melbourne, ... farthest from the sun in early July. ... means that winters in the Northern Hemisphere are slightly milder than ... The longitude of perihelion also changes over time. ...
    (sci.astro)
  • Re: Birthday calculator
    ... No-one ever said that the Earth is some 5 million km away from the EMB. ... What we said is that the Earth's time of closest approach to the Sun is ... The Earth-Moon system is moving through perihelion at circa 30 km/s; ...
    (sci.astro)
  • Re: Precession of the equinoxes ?
    ... |> | perihelion you expect is based on the barycentre of the Earth/Moon ... |> The ONLY reason the calendar is "jumping around" is because there ... imagine the Earth keeping one face toward the sun just ... Bluster and I'll come down ...
    (sci.physics)
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