Hi there dudes. Assuming those NASA dudes can find a way to lauch GPB while there's a light breeze in the air... http://einstein.stanford.edu/ ..... In 16 months time GR could be dead. All the GR trumpeteres around the world who have spent their whole lives whacking anti GR dudes, and believing fanatically in the existance of dark matter (?) and dark energy (????) , will be squashed and the flood gates will be open for the rabid foaming-at-the mouth alternate theory believers to stampede through physics bellowing " WE TOLD YOU SO!!" . The grim reality is that it's main use will be another excuse for the string theorists to have there research grants increased. Bah. Me, despite what I said to FZ+, I like to believe that GPB WILL get a result which differs from GR prediction. I just can`t condone daft Dark matter , let alone dark energy. The modern concepts of DM/DE, whose current understanding relies heavily on GR, will vanish with GR. Dark matter was invented to comprehend galaxy dynamics when observations didn`t corelate with GR. The most central non-corelation is the galactic rotation anomaly. With just obesevational mass, galaxys should not be able to hold themselves together via gravity, the stars they are composed of should just fly out into outer space. Also, galaxy differential spin is very awkward to explain. Dark matter was ceratinly the most intuitive response to the incompatable observations. However, time and practice has shown that rigid following of DM leads to bizzare, unbelievable, imcompatible and unobserved physics. Young astro physics dudes are warming to MOND, an alternative to GR and dark matter. Skeptics are quick to whack MOND with the argument that it has no theoretic framework. But this is hardly fair. MOND believe is tolerated amongst observational physicists, simply because it gives the best predictions, while DM gives rubbish predictions. Despite this, until very recently, the DM believers have always been the ones who call the shots in astro-physics and have crushed any big movement in the theorectical physics towards explaining MOND. Thus DM theorectical dudes have cut themselves off from the rest of physics, effectively creating and living in their own self-made land of delusion! Oh well. Thats why I hope GPB will give anti-GR results, because that will speed up the demise of the dark matter/energy nonsense. Based on this hope, I predict that GPB will find that space time warping is higher than expected! Galaxys hold themselves together because the stars in them aren`t traveling through space-time as fast as we thought.