A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Others » UK Astronomy
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

Pioneer 10 and 11



 
 
Thread Tools Display Modes
  #1  
Old September 8th 07, 07:49 PM posted to uk.sci.astronomy
[email protected]
external usenet poster
 
Posts: 80
Default Pioneer 10 and 11

http://www.youtube.com/watch?v=AoEfWNkdScY mentions that these
satellites (?) probes rather, wondered off course and no-one knows
why.

Anyone have a theory?

  #2  
Old September 8th 07, 08:25 PM posted to uk.sci.astronomy
Mike Williams
external usenet poster
 
Posts: 108
Default Pioneer 10 and 11

Wasn't it who wrote:
http://www.youtube.com/watch?v=AoEfWNkdScY mentions that these
satellites (?) probes rather, wondered off course and no-one knows
why.

Anyone have a theory?


Last I heard as that the tiny deviation from the predicted course could
be accounted for by the difference in radiation pressure caused by the
far side being darker than the near side and therefore emitting more IR.

When the anomaly was first noticed, back in 1998, there were some whacky
suggestions put forth that gravity might not exactly follow an inverse-
square law, but that's been pretty well squashed by noticing that no
such effects have been observed on other probes such as Galileo and the
Voyagers. Whatever is causing the effect is specific to the design of
the Pioneer probes.

--
Mike Williams
Gentleman of Leisure
  #3  
Old September 8th 07, 10:44 PM posted to uk.sci.astronomy
Mark Conroe
external usenet poster
 
Posts: 11
Default Pioneer 10 and 11


"Mike Williams" wrote:

When the anomaly was first noticed, back in 1998, there were some whacky
suggestions put forth that gravity might not exactly follow an inverse-
square law, but that's been pretty well squashed by noticing that no
such effects have been observed on other probes such as Galileo and the
Voyagers. Whatever is causing the effect is specific to the design of
the Pioneer probes.


Voyager and Galileo are 3-axis stablized -- their thrustings would overwhelm
any equivalent 'Pioneer anomaly' signal.



  #4  
Old September 14th 07, 05:00 AM posted to uk.sci.astronomy
Llanzlan Klazmon the 15th
external usenet poster
 
Posts: 275
Default Pioneer 10 and 11

" wrote in
ups.com:

http://www.youtube.com/watch?v=AoEfWNkdScY mentions that these
satellites (?) probes rather, wondered off course and no-one knows
why.

Anyone have a theory?



http://en.wikipedia.org/wiki/Pioneer_anomaly
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
A what if, Pioneer 0-2 neopeius History 14 November 11th 06 03:57 AM
30 Years of Pioneer Spacecraft Data Rescued: The Planetary Society Enables Study of the Mysterious Pioneer Anomaly [email protected] News 0 June 6th 06 05:35 PM
Pioneer Saturn (aka Pioneer 11) Encounter Trajectory - Question. Ian R Misc 0 December 5th 03 12:35 AM
Pioneer Saturn (aka Pioneer 11) Encounter Trajectory - Question. Ian R History 4 December 4th 03 11:26 PM


All times are GMT +1. The time now is 12:57 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.