The novel physics methodology of subquantum kinetics predicted
in 1979 that photons should blueshift their frequency at a rate
that varies directly with negative gravitational potential, the
rate of blueshifting for photons traveling between Earth and
Jupiter having been estimated to average approximately 1.3±0.65
X 10^-18 s^-1, or 1.1±0.6 X 10^-18 s^-1 for signals traveling
a roundtrip distance of 65 AU through the outer solar system.
A proposal was made in 1980 to test this blueshifting effect
by transponding a maser signal over a 10 AU round-trip distance
between two spacecraft. This prediction has more recently been
corroborated by observations of maser signals transponded to
the Pioneer 10 spacecraft. These measurements indicate a frequency
shifting of approximately 2.28 ± 0.4 X 10^-18 s^-1 which
lies within 2s of the subquantum kinetics prediction and which cannot
be accounted for in terms of known forces acting on the craft.
This blueshifting phenomenon implies the existence of a new source
of energy which is able to account for the luminosities of red
dwarf and brown dwarf stars and planets, and their observed sharing
of a common mass-luminosity relation.