pioneer Definition and 40 Threads

If i create a non combustible self-sustaining energy source that generates zero radiation, what kind of propulsion system could be designed? Is someone out there with that type of propulsion system already?

With regard to solar radiation effects causing the onset of effect, have any here investigated whether this is consistent with the observed residuals? Because the power of solar radiation is proportional to inverse square of distance from the Sun, it seems plausible to me that the mis-modeled...

http://www.bbc.com/news/science-environment-39212305

Dear all I' d like to draw the attention on (and discuss) something extremely strange i noticed in recent publications related to the Pioneer effect. This does not require more than undergraduate level and its only about very basic classical physics : the Doppler effect and nothing else! After...

He revolutionized amateur astronomy. http://www.universetoday.com/108150/john-dobson-inventor-of-the-popular-dobsonian-telescope-dead-at-98/ http://www.skyandtelescope.com/news/John-Dobson-1915ndash2014-240456881.html

http://www.sfgate.com/bayarea/article/Ray-Dolby-pioneering-sound-engineer-dies-at-80-4810882.php Those of us who grew up with audio cassettes remember the Dolby noise-reduction system for reducing tape hiss. It made cassettes capable of "high fidelity" music reproduction, at least by the...

Does general relativity explain the Pioneer effect and the spacecraft flyby anomaly? I have seen several papers on those two topics but no GR explanation.

http://spectrum.ieee.org/aerospace/astrophysics/finding-the-source-of-the-pioneer-anomaly/?utm_source=techalert&utm_medium=email&utm_campaign=120612 I believe this settles it.

What evidence proves that photon emission of an object, - at all sends some of its momentum back to the source, - and thereby cause it to decelerate (or move opposite)? Or what is the evidence proving that photon emission at all do have a decelerating influence on the object emitting the...

The Pioneer anomaly I read that the Pioneer anomaly is a sunward acceleration that is larger than Newtonian gravity predicts. This extra acceleration has been measured at; (8.74 ± 1.33) × 10−10 m/s2 between 10AU and 90AU from the Sun. But because the ‘extra acceleration’ is constant across...

Homework Statement To escape from the solar system, how fast did the Pioneer 10 have to be traveling as it passed the orbit of Jupiter? Assume the mass of the solar system is essentially concentration in the Sun. The mass of the Sun is 1.99 x 10^30 kg and the radius of Jupiter's orbit is 7.78...

The very likely explanation of the apparent Pioneer anomaly through improved heat radiation models (https://www.physicsforums.com/showthread.php?t=486509". As luck would have it, just today I stumble upon an article on improved measurements of the Earth's gravitational field by the...

We've known for a while that the Pioneer anomaly couldn't be gravitational: Iorio, "Does the Neptunian system of satellites challenge a gravitational origin for the Pioneer anomaly?," http://arxiv.org/abs/0912.2947 Now it looks like it's completely solved: F. Francisco, O. Bertolami, P...

This area of physics (GR and spacecraft anomalies) have intrigued me for years. I have discovered a few things and developed a model that seems to fit the Pioneer's anomaly, with a couple of intriguing "nudges" to our existing GR physics model. Would like to publish and or have the...

I have looked through the on-line documentation of the Pioneer Anomaly, and have a simple question: Could the apparent additional acceleration toward the Sun be due to an additional mass of dust which adhered to the spacecraft ? I notice that the authors of the main papers (...

One of the proposed explanations for the Pioneer Anomaly is that the additional deceleration is caused by interaction with the vacuum energy. http://en.wikipedia.org/wiki/Pioneer_anomoly#Definition_of_inertia_modified This makes sense to me, given that some of the particles must actually...

Pioneer Spacecraft: As far as I know, the "extra" apparent acceleration towards the sun is yet to be adequately explained or shown to be an empirical error. Given the ad-hoc nature of this experiment it may require a better one to resolve this, but it got me thinking about what is unique about...

Can anyone tell me how I could find out the exact direction that the Pioneer spacecraft are travelling? I need to figure out what direction they are traveling relative to the cosmic microwave background radiation. Thanks. ( http://en.wikipedia.org/wiki/Pioneer_anomaly )

H. Edward Roberts, PC Pioneer, Dies at 68 http://www.nytimes.com/2010/04/03/business/03roberts.html I remember some of the first PCs, like the Altair, and Tandy's version, Commodore-64, and the first IBM PC (based on an 8086 processor). I bought my first PC in 1985 and added an 8087 math...

An analysis of the orbits of Neptune's satellites seems to show that the Pioneer anomaly can't be gravitational. http://www.technologyreview.com/blog/arxiv/24541/

Agriculture and gardening are two keen personal interests. I happened to catch this story on NPR. Prairie Pioneer Seeks To Reinvent The Way We Farm http://www.npr.org/templates/story/story.php?storyId=113766846 by Richard Harris Wes Jackson's group, The Land Institute, are attempting to...

I got to share this, even though it is not all that. I just got back from a family gathering and talked with my older brother for the first time since Christmas. This summer he visited a Diving museum in Florida, across one wall was large picture of the first 9 Navy divers. The ones who...

Several space probes was by gravity assist manoeuvre gaining between 4 and 13 mm velocity per second. Are this values average based on acceleration through time, or are these pure deceleration per second?

Now it’s Saturn’s turn to flummox astrophysicists. The Russian astronomer Elean Pitjeva, who heads the Laboratory of Ephemeris Astronomy at the Institute of Applied Astronomy in St Petersburg, has analysed a huge data set of planetary observations dating back to 1913, including 3D observations...

Is the Pioneer Anomaly really directed towards the Sun ? How sure are we ? Why not directed around the Sun ?

A nice review of the anomaly has just been published on the Physics ArXiv as a result of an "Invited talk in Astronomia Dinamica en Latinoamerica. To be published in Revista Mexicana de Astronomia y Astrofisica, Conference Series." The Anomalous Acceleration of the Pioneer Spacecrafts with the...

I've been thinking about this for a while but never got around to asking this. This has two parts. First, I understand that time and matter are closely related and that time slows down when in proximity to more matter. So, time on the moon is faster than time on Earth and time on Jupiter is...

If you look up the pioneer anomaly you will find out that over vast distances they are slightly off in there mesurements on where the probes should be, in that they lose 5,000 meters a year. This means they are going slower than physics says they should. While I am not a physicist (I would...

I heard an interview with a physicist on the radio who was talking about how the pioneer 9 and 10 felt an anomylous acceleration towards the sun during their missions. The force was 1/10 millionth of a G and according to the physicist who helped try to solve this mystery at the JPL labs, the...

I came upon http://arxiv.org/PS_cache/gr-qc/pdf/0104/0104064.pdf" that describes the analysis of the anomalous acceleration of Pioneer 10 and 11, an unexplained perturbation of the trajectories of these spacecraft launched in the early 70's and observed during several decades. After a...

http://www.zoran-ozimec.com/ In short he claims that Newton's law must be slightly corrected on base of material difference between mases in interaction. Given also is one calculation that predicts difference between classical (Newton's formula) and new formula by about 0.3%. Computer...

A couple of matters have caused me some curiosity of late. One is the "Pioneer Anomaly", wherein exploratory spacecraft are slightly off course: http://en.wikipedia.org/wiki/Pioneer_anomaly The other is something I read about recently in New Scientist, about a revised theory of gravity...

http://lanl.arxiv.org/pdf/quant-ph/0501041 the pioneer anomaly is due to topological phase defect of light

http://story.news.yahoo.com/news?tmpl=story&cid=2026&ncid=2026&e=10&u=/latimests/20041221/ts_latimes/gravitymayloseitspull http://arxiv.org/PS_cache/gr-qc/pdf/0104/0104064.pdf

hi Im stuck on how to do this question ...can anyone give me any hints : The American artificial planet Pioneer IV reached its closest approach to the sun 91.7 million mi on march 17 1959. At aphelion it will be 106.1 million mi from the sun. What is: a.) the speed at which it passed...

Is the pioneer anomaly due to quintessence? I thought this was interesting http://www.arxiv.org/PS_cache/gr-qc/pdf/0407/0407023.pdf

Pioneer anomaly--LQG style an effort is being made to see if the Pioneer anomaly can be understood within the context of Loop gravity why should acceleration taper off so slowly after a while, or not at all? we should have the data handy, like in this paper...

What is the magnitude of the temperature of space at 20 - 70 AU from the sun? And how much would a piece of copper, aluminium or iron contract by at this temperature?Assuming the pioneer 10 space probe is made from these metals!

Did anyone ever find out why pioneer 10 had an anomalous acceleration of 10^ - 8 cm/s/s towards the Sun?

Having Howard Stern's controversial radio show suspended shows where America is headed when it comes to free speech and the ability to excercise the first amendment. I used to despise the Stern show as I took personal offense to his comments regarding women, but as I experienced some life...