Solar system expansion and strong equivalence principle as seen by the NASA MESSENGER mission
A Genova, E Mazarico, S Goossens… - Nature …, 2018 - nature.com
The NASA MESSENGER mission explored the innermost planet of the solar system and
obtained a rich data set of range measurements for the determination of Mercury's
ephemeris. Here we use these precise data collected over 7 years to estimate parameters
related to general relativity and the evolution of the Sun. These results confirm the validity of
the strong equivalence principle with a significantly refined uncertainty of the Nordtvedt
parameter η=(− 6.6±7.2)× 10− 5. By assuming a metric theory of gravitation, we retrieved the …
obtained a rich data set of range measurements for the determination of Mercury's
ephemeris. Here we use these precise data collected over 7 years to estimate parameters
related to general relativity and the evolution of the Sun. These results confirm the validity of
the strong equivalence principle with a significantly refined uncertainty of the Nordtvedt
parameter η=(− 6.6±7.2)× 10− 5. By assuming a metric theory of gravitation, we retrieved the …
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