🚀 go-pugleaf

On 5 mayo, 09:18, Dorn Strich <strich.9...@gmail.com> wrote:
> On 5 Maijs, 06:34, Pentcho Valev <pva...@yahoo.com> wrote:
>
> Do you know that Man went to the moon and back using basic Newtonian
> physics without the need for any relativity?
>
> Yes that is right.  Man went to the moon and back, using the very
> accurate physics of Newton and nothing else.
>
> I am sure if the NASA scientists had factored in relativity, the
> astronauts would have missed the moon by a LOOOOOOOOOONG shot.  Now
> that is an example of how relativity can kill people.
>
> > Pentcho Valev
> > pva...@yahoo.com
>
>
For sure, I don't need General Relativity to find my way to Walmart
either!

Yeah you are right David!...and all these wacko NASA scientists
continue to do wacko things, like confirming Einstein theories with
their exploration vehicles!!!

A test of general relativity using radio links with the Cassini
spacecraft
Bertotti, B; Iess, L; Tortora, P
Nature (0028-0836), vol. 425, no. 6956, 25 Sept. 2003, p. 374-376
According to general relativity, photons are deflected and delayed by
the curvature of space-time produced by any mass (Will, 1993, 2001,
2003; Ciufolini and Wheeler, 1995). The bending and delay are
proportional to gamma + 1, where the parameter gamma is unity in
general relativity but zero in the Newtonian model of gravity. The
quantity gamma - 1 measures the degree to which gravity is not a
purely geometric effect and is affected by other fields; such fields
may have strongly influenced the early universe, but would have now
weakened so as to produce tiny, but still detectable, effects. Several
experiments have confirmed to an accuracy of about 0.1 percent the
predictions for the deflection (Dyson et al., 1920; Lebach et al.,
1995) and delay (Reasenberg et al., 1979) of photons produced by the
sun. Here, we report a measurement of the frequency shift of radio
photons to and from the Cassini spacecraft as they passed near the
sun. Our result, gamma = 1 + (2.1 +/- 2.3) x 10 exp -5, agrees with
the predictions of standard general relativity with a sensitivity that
approaches the level at which, theoretically, deviations are expected
in some cosmological models (Damour and Polyakov, 1994; Damour et al.,
1994).

Relativistic Corrections to Lunar Occultations
Costantino Sigismondi
ICRA, International Center for Relativistic Astrophysics & University
of Rome La Sapienza,
Piazzale Aldo Moro 5 00185 Roma Italia
(Received 15 November 2007)

During a lunar occultation the light of a star is bent by the solar
gravitational field, while the lunar profile is much less shifted by
relativistic light bending. Relativistic corrections of order of
milliseconds in the absolute timing of occultations have to be
considered for this effect. The accuracy of absolute timing
predictions is studied with the aid of WinOccult program in the cases
of occultations of Saturn (May 22, 2007), Venus (June 18, 2007) and
Pleiades (August 7, 2007), including the effect of irregularities of
lunar limb's profile down to sub-arcsecond length scale.

Progress in Lunar Laser Ranging Tests of Relativistic Gravity
James G. Williams,_ Slava G. Turyshev, and Dale H. Boggs
Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA 91109, USA
(Dated: February 6, 2008)
Analyses of laser ranges to the Moon provide increasingly stringent
limits on any violation of the equivalence principle (EP); they also
enable several very accurate tests of relativistic gravity. These
analyses give an EP test of delta(M_G/M_I)_EP = (-1.0±1.4)×10-13. This
result yields a strong equivalence principle (SEP) test of delta(M_G/
M_I)_SEP = (-2.0±2.0)×10-13. Also, the corresponding SEP violation
parameter nu is (4.4 ± 4.5) × 10-4, where nu = 4beta-gamma-3 and both
beta and gamma are
post-Newtonian parameters. Using the Cassini gamma, the nu result
yields beta-1 = (1.2±1.1)×10-4. The geodetic precession test,
expressed as a relative deviation from general relativity, is K_gp =
-0.0019±0.0064. The search for a time variation in the gravitational
constant results in ˙ Gdot/G = (4±9)×10-13 yr-1; consequently there is
no evidence for local (around 1 AU) scale expansion of the solar
system.

Miguel Rios