A “quick” historical summation is always nice when looking at this “graduation process” of the interferometer, to present day aspirations in astronomical proportions. Thanks Count

How much bigger is LIGO then it’s counterpart in Michelson interferometer. Kip Thorne as Wheeler’s protege, contributed greatly as a well as a proportional measure, according to the size of LIGO?

Wonderful.

The most accurate way to determine relative distances on Earth is not via the GPS system, but rather by doing observations of distant quasars using the VLBI system of radio telescopes, see here.

Wonderful indeed, that 35 years in duration, and we can find “new uses” for these experiments.

http://physics.ucsd.edu/~tmurphy/apollo/first_lt.html

Besides the importance of testing theories of gravity, yada yada yada, how freakin’ cool is it to be shooting laser beams at the moon!

Weak field measures have not in any way dissuaded one from see applicable understanding using Grace, and in the time variable arena, our views have changed?

That doesn’t go away.

Lagrangian perspectve on Earth sun relations hasn’t changed either, and hence our views of that gravitational perspective as well?

The “high energy sector” (strings) if seen within the context of being wrapped(Coleman-De Luccia instanton), would still implore and I speculate, the need for gravitational perspective? If weak, still consistent with high energy perspectives?

Varney’s work for instance.

The electromagnetic properties of superconductors are explained in quantum theory by assuming that force-carrying particles, known as photons, gain mass. By allowing force-carrying gravitational particles, known as the gravitons, to become heavier, they found that the unexpectedly large gravitomagnetic force could be modelled.

Physical existence of gravitons aside, Gravity Probe B was two pairs of anti-parallel superconductive 4300 rpm gyroscopes free falling in a 0.7742 rpm housing. No anomaly vs. housing or reference star was detected over 352 days of free fall. Cf: Podkletnov.

Binary pulsars orbit to General Relativity specs within observational error. A pair of 1.4 solar mass superconductng gyroscopes with equatorial surface velocities of 20% lightspeed bearing huge magnetic fields and observed over months gave no anomalies,

http://relativity.livingreviews.org/Articles/lrr-2006-2/
http://relativity.livingreviews.org/Articles/lrr-2005-7/

Do left and right hands locally vacuum free fall identically? Is there a chiral pseudoscalar vacuum background in the mass sector? A parity Eötvös experiment compares calculated opposite parity space group otherwise exactly identical single crystal test masses: same chemical composition, density, shape, mass, nuclear properties… for every classical and quantum physics observable. The atomic lattices are non-superposable mirror images that calculate to within 10^(-15) relative of maximal theoretical parity divergence for 1 cm diameter alpha-quartz test masses. There is no basis for non-null output other than EP parity violation by chiral mass distributions.

EP parity violation could be 1000X detection sensitivity without contradicting prior observation in any venue at any scale. One is amazed that academic physicists refuse to look. Parity violation is the only allowed EP violation at 10^(-13) difference/average sensitivity.

Sean, thanks for that link to the DGP paper, and thanks for calling them “clever folks”, not “free-thinkers” etc.

“We discuss the idea that the accelerated Universe could be the result of the gravitational leakage into extra dimensions on Hubble distances rather than the consequence of non-zero cosmological constant.” - http://arxiv.org/abs/hep-th/0005016

This is the kind of investigation which is respectable; it’s a risk-taking scientific model that could be wrong. Abstract stringy-type models of unobservables (which take no real risk of being wrong) are boring. Let’s hope the Lunar ranging produces fuzzy results which shore up funding for extra dimensional theorists a bit longer.