Jump to content




Welcome to Unexplained Mysteries! Please sign in or create an account to start posting and to access a host of extra features.


- - - - -

Solving NASA's Great Gravity Mystery


  • Please log in to reply
22 replies to this topic

#16    poleshift

poleshift

    Ectoplasmic Residue

  • Member
  • Pip
  • 209 posts
  • Joined:13 Mar 2004

Posted 19 April 2007 - 04:50 PM

Unaccountable interstellar wind?


#17    Waspie_Dwarf

Waspie_Dwarf

    Space Cadet

  • 30,922 posts
  • Joined:03 Mar 2006
  • Gender:Male
  • Location:Bexleyheath, Kent, UK

  • We are all in the gutter, but some of us are looking at the stars.

    Oscar Wilde

Posted 19 April 2007 - 06:07 PM

Quote

Unaccountable interstellar wind?


This occured whilst the craft were still inside the heliopause, so the effect from solar wind would be greater than that from intestellar space. If there was any effect form this at all (and that is highly unlikely as the solar and interstellar winds are highly tenuous) it would be an acceleration in the opposite direction to that actually observed.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

Posted Image
Click on button

#18    Startraveler

Startraveler

    Fleet Captain

  • Member
  • 4,491 posts
  • Joined:25 Jun 2006
  • Gender:Male
  • Location:New England

  • Knowledge Brings Fear.

Posted 19 April 2007 - 08:17 PM

Quote

If these objects are struggling to escape the solar system, and are indeed decellerating..... What is different about Halley's comet that allows it to escape freely and return in cycles? Purely the speed or composition?


Halley's comet is in a bound orbit, meaning it actually has less energy and can't escape the solar system. The Pioneers, on the other hand, won't be turning around, even if the anomalous acceleration is taken into account. The total energy is what determines whether the orbit is bounded or unbounded.

Quote

What is the gravitational pull of the Sun? It obviously extends to Pluto (and beyond reading another thread 1Ly? ouch!).... Is this force significant enough to decellerate?


The anomalous acceleration is an extra one on top of all other factors.

Quote

Have the probes been caught into the gravity of an asteroid or similar that has not yet been discovered?


That seems unlikely. It's rare to encounter a body in space by accident and both Pioneers (which are on opposite ends of the solar system) seem to be experiencing an acceleration of roughly the same magnitude, which would be quite a coincidence.


#19    poleshift

poleshift

    Ectoplasmic Residue

  • Member
  • Pip
  • 209 posts
  • Joined:13 Mar 2004

Posted 20 April 2007 - 10:16 PM

Thanks Waspie.


#20    Leonardo

Leonardo

    Awake

  • Member
  • 14,765 posts
  • Joined:20 Oct 2006
  • Gender:Male
  • Location:UK

  • Hell is a guilty conscience

Posted 21 April 2007 - 03:25 AM

Here's another silly idea to be shot down in flames.

Could this be the result of a reflection of energy from the heliopause?

I know the solar wind slows down dramatically as the heliopause is approached, eventually to sub-sonic speeds. Well, I know sound doesn't travel in vacuum but it's not technically a vacuum and it could be possible some kind of weak wave energy is being reflected back from the sonic barrier/heliopause and this is having a small effect on these craft?

*waits for Waspie and Startraveler to show him how stupid the idea is*

Edited by Leonardo, 21 April 2007 - 04:51 AM.

In the book of life, the answers aren't in the back. - Charlie Brown

"It is a profound and necessary truth that the deep things in science are not found because they are useful; they are found because it was possible to find them."  - J. Robert Oppenheimer; Scientific Director; The Manhattan Project

"talking bull**** is not a victimless crime" - Marina Hyde, author.

#21    Startraveler

Startraveler

    Fleet Captain

  • Member
  • 4,491 posts
  • Joined:25 Jun 2006
  • Gender:Male
  • Location:New England

  • Knowledge Brings Fear.

Posted 22 April 2007 - 06:22 AM

Ignoring any physics, just the timing makes an idea like that suspect. The effect has been known since about 1980 when Pioneer 10 was 20 AU (a little more than a fifth of the way to the heliopause).


#22    wtwt5237

wtwt5237

    Ectoplasmic Residue

  • Member
  • Pip
  • 134 posts
  • Joined:19 Apr 2007

Posted 05 May 2007 - 07:12 AM

Is there data available of how much deviation is there? If this deviation is not that much, we needn't pay too much attention. Anything can cause such deviation. Floating particles in space, gravity pull of small unknown celestial bodies or some kind of problems related to observation methods. If not, revolution in physics or astronomy is waiting for us, surely.


#23    Legatus Legionis

Legatus Legionis

    Bellcross

  • Member
  • 3,177 posts
  • Joined:24 Feb 2007
  • Gender:Male
  • Location:Planet Oros

  • Everything that the human race has done and thought is concerned with the satisfaction of deeply felt needs and the assuagement of pain

Posted 05 May 2007 - 04:40 PM

Quote

Is there data available of how much deviation is there? If this deviation is not that much, we needn't pay too much attention. Anything can cause such deviation. Floating particles in space, gravity pull of small unknown celestial bodies or some kind of problems related to observation methods. If not, revolution in physics or astronomy is waiting for us, surely.

First of all. Unknown Celestial Objects in the solar system are quite very rare as Startraveler said

Quote

That seems unlikely. It's rare to encounter a body in space by accident and both Pioneers (which are on opposite ends of the solar system) seem to be experiencing an acceleration of roughly the same magnitude, which would be quite a coincidence.


and small particles in space would not affect the speed of the "Pioneers" in their current speed.







0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users