MICROSCOPE satellite test of general relativity: No deviations from the equivalence principle at the 10⁻¹⁴ level

While the best measure of the principle of equivalence had not been exceeded for 10 years, the first results of the CNES MICROSCOPE satellite, equipped with ONERA accelerometers, make it possible today to be 10 times better. They demonstrate, with unparalleled precision, 2.10-14, that bodies fall into emptiness with the same acceleration. The principle of equivalence remains at this unshakable […]

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Tiny changes in Earth’s gravitational field could help predict tsunami’s size

For several years now, the APC Virgo Group has been involved in studying the possible synergies between geophysics and terrestrial gravitational wave detectors. Geophysical phenomena cause disturbances of “Newtonian” gravity. If these are not gravitational waves, common interests, especially on measurement techniques, bring the two communities closer together. The studies published in Nature Communications in 2016 (Montagner et al.) And […]

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Success for the 2017 edition of National Science Festival

UnivEarthS was very present on the campus of the Paris Diderot University during the 2017 edition of the Science Festival, and hosted many classes as well as the general public thanks to the researchers and students who involved in the event. Exhibitions, conferences and workshops helped everyone to discover the different aspects of the Earth and Universe Sciences which are the […]

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First detection unit of the KM3NeT/ORCA neutrino detector

Last week, an extensive sea operation took place to deploy several elements of the KM3NeT/ORCA detector at the KM3NeT-Fr site, about 40 km offshore from Toulon. Amongst them, the first detection unit of ORCA comprising 18 optical modules, spaced at 9 m along a 200 m high vertical neutrino detection line. The deployment and connection of the detection unit was performed with the […]

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Straight to the source: the LIGO-Virgo global network of interferometers opens a new era for gravitational wave science

  A fourth gravitational-wave signal coming from the merger of two stellar mass black holes located about 1.8 billion light-years away was detected on the 14th of August 2017, at 10:30:43 UTC. GW170814 is the first event observed by the global 3-detector network, including not only the two twin Advanced LIGO detectors but the Advanced Virgo detector as well. Following […]

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