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Race Jackson Wrote:
-------------------------------------------------------
> Yes. See
> Lunar Orbital Evolution: A Synthesis of Recent Results

> The paper cites
> other papers for the rate of change of the lunar
> orbit, that rate of change is based on the
> measurements from the retroreflectors (which are
> not directly cited in this paper, but are cited in
> the papers cited).


Thanks! I'll take a look.

Edited later to add:

Hi Race,

I’ve read your link, and as you say, it doesn’t mention the retroreflectors, which are merely the means to measure the moon’s distance.

The paper deals with how the rate of recession has speeded up due to tidal friction caused by changes in the geographical location of the continental masses (plate tectonic movement). In the far distant past, when landmasses were different shapes and in different locations, tidal friction was less, hence the rate of recession was slower too.

The distance between earth and moon, given by the history of readings from the reflectors, if extrapolated backwards without taking the changes due to landmasses influencing tidal friction, would give us an impossibly close orbit of the moon – one almost touching the earth’s surface!

As an aside on the retroreflectors, I was reading yesterday about the precision of the readings, a precision “equivalent in accuracy to determining the distance between Los Angeles and New York to 0.25 mm (0.0098 in)”, according to Wiki. That’s some accuracy!

It also mentions the fact that the reflectors are degrading with age. Hopefully, it won’t be another fifty years before astronauts return to replace them with superior modern technology!

Carol



Edited 1 time(s). Last edit at 08-Mar-18 19:11 by carolb.

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Subject Views Written By Posted
To the moon and back... 3762 Racho 04-Jan-18 08:09
Re: To the moon and back... 500 Thunderbird 06-Jan-18 18:10
Grissom and the horrible 'accident' 473 Racho 07-Jan-18 08:08
Re: They went around the Moon Apollo 8 411 molder 17-Jan-18 12:20
Re: They went around the Moon Apollo 8 389 Racho 17-Jan-18 20:31
Re: They went around the Moon Apollo 8 382 molder 18-Jan-18 11:26
Re: They went around the Moon Apollo 8 383 Racho 18-Jan-18 17:52
Re: They went around the Moon Apollo 10 400 molder 19-Jan-18 11:30
Making up ones mind... 371 Racho 21-Jan-18 21:45
Re: Making up ones mind... 465 molder 21-Jan-18 22:53
Re: Making up ones mind... 338 Thunderbird 08-Mar-18 17:19
Re: To the moon and back... 354 Race Jackson 07-Mar-18 18:51
Re: To the moon and back... 341 Racho 07-Mar-18 20:04
Re: To the moon and back... 348 carolb 07-Mar-18 20:29
Re: To the moon and back... 340 Race Jackson 08-Mar-18 15:22
Re: To the moon and back... 336 carolb 08-Mar-18 15:38
Re: No Man placed a reflector on the Moon 352 Thunderbird 08-Mar-18 01:42
Re: No Man placed a reflector on the Moon 355 carolb 08-Mar-18 01:58
At least admit the truth of the matter Carol 376 Racho 08-Mar-18 03:22
I do hope for a reply...either from you or others re: Van Allen belt 374 Racho 08-Mar-18 04:23
Re: Size matters 333 Thunderbird 08-Mar-18 17:44
Re: To the moon and back... 325 Race Jackson 08-Mar-18 20:57
Re: Apollo 11 to the Moon.....Nope.....not happening : ) 368 Thunderbird 08-Mar-18 21:46
Re: To the moon and back... 335 ldennyjr 28-Mar-18 21:59
cardboard airlock doors... 328 Racho 29-Mar-18 01:20
Re: To the moon and back... 327 Race Jackson 29-Mar-18 21:59
Direct question then (not that I haven't posed any before ...) 337 Racho 30-Mar-18 06:49
Re: Direct question then (not that I haven't posed any before ...) 333 ldennyjr 30-Mar-18 21:03
Simple science question? Does AC even work in the vaccum of space...? 328 Racho 01-Apr-18 01:01
Re: NASA is Occult/FreeMasonic deception and Propoganda 325 Thunderbird 02-Apr-18 18:12
Re: NASA is Occult/FreeMasonic deception and Propoganda 293 Race Jackson 03-Apr-18 16:09
Windows matter... 370 Racho 05-Apr-18 01:00
Re: Windows matter... 404 Dr. Troglodyte 05-Apr-18 21:45
Re: Windows matter... 329 ldennyjr 06-Apr-18 02:01
Re: lol!.....the Smithsonian magazine 357 Thunderbird 08-Apr-18 00:52
Re: Eyes wide open... 363 Thunderbird 08-Apr-18 01:14
Re: Simple science question? Does AC even work in the vaccum of space...? 300 Race Jackson 03-Apr-18 16:15
Re: Simple science question? Does AC even work in the vaccum of space...? 303 ldennyjr 03-Apr-18 17:17
Re: Simple science question? Does AC even work in the vaccum of space...? 303 Racho 03-Apr-18 18:33
Re: Simple science question? Does AC even work in the vaccum of space...? 302 ldennyjr 03-Apr-18 20:17
Re: Simple science question? Does AC even work in the vaccum of space...? 317 Racho 03-Apr-18 21:03
Re: Simple science question? Does AC even work in the vaccum of space...? 311 ldennyjr 04-Apr-18 00:47
Re: Simple science question? Does AC even work in the vaccum of space...? 345 carolb 04-Apr-18 01:09
As a heavy machinist... 330 Racho 04-Apr-18 06:35
Re: As a heavy machinist... 301 ldennyjr 04-Apr-18 22:38
So what? 308 Racho 04-Apr-18 23:28
Re: So what? 315 ldennyjr 05-Apr-18 13:40
Re: So what? 627 ldennyjr 11-Apr-18 13:37
Re: As a heavy machinist... 338 carolb 05-Apr-18 15:04
Re: Simple science question? Does AC even work in the vaccum of space...? 311 WhoWeird 03-Apr-18 21:37
Re: Simple science question? Does AC even work in the vaccum of space...? 304 Racho 03-Apr-18 21:39
Re: To the moon and back... 333 Race Jackson 30-Mar-18 16:20
Re: To the moon and back... 309 Race Jackson 04-Apr-18 21:52
Re: To the moon and back... 301 ldennyjr 06-Apr-18 17:28
Re: To the moon and back... 354 carolb 06-Apr-18 19:01


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