Imperial College London


Faculty of Natural SciencesDepartment of Physics

Professor of Experimental Astrophysics



+44 (0)20 7594 7552t.sumner




1108Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Touboul, P and Metris, G and Rodrigues, M and Andre, Y and Baghi, Q and Berge, J and Boulanger, D and Bremer, S and Carle, P and Chhun, R and Christophe, B and Cipolla, V and Damour, T and Danto, P and Dittus, H and Fayet, P and Foulon, B and Gageant, C and Guidotti, P-Y and Hagedorn, D and Hardy, E and Phuong-Anh, H and Inchauspe, H and Kayser, P and Lala, S and Laemmerzahl, C and Lebat, V and Leseur, P and Liorzou, F and List, M and Loeffler, F and Panet, I and Pouilloux, B and Prieur, P and Rebray, A and Reynaud, S and Rievers, B and Robert, A and Selig, H and Serron, L and Sumner, T and Tanguy, N and Visser, P},
doi = {10.1103/PhysRevLett.119.231101},
journal = {Physical Review Letters},
title = {MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle},
url = {},
volume = {119},
year = {2017}

RIS format (EndNote, RefMan)

AB - According to the weak equivalence principle, all bodies should fall at the same rate in a gravitational field. The MICROSCOPE satellite, launched in April 2016, aims to test its validity at the 10−15 precision level, by measuring the force required to maintain two test masses (of titanium and platinum alloys) exactly in the same orbit. A nonvanishing result would correspond to a violation of the equivalence principle, or to the discovery of a new long-range force. Analysis of the first data gives δ(Ti,Pt)=[−1±9(stat)±9(syst)]×10−15 (1σ statistical uncertainty) for the titanium-platinum Eötvös parameter characterizing the relative difference in their free-fall accelerations.
AU - Touboul,P
AU - Metris,G
AU - Rodrigues,M
AU - Andre,Y
AU - Baghi,Q
AU - Berge,J
AU - Boulanger,D
AU - Bremer,S
AU - Carle,P
AU - Chhun,R
AU - Christophe,B
AU - Cipolla,V
AU - Damour,T
AU - Danto,P
AU - Dittus,H
AU - Fayet,P
AU - Foulon,B
AU - Gageant,C
AU - Guidotti,P-Y
AU - Hagedorn,D
AU - Hardy,E
AU - Phuong-Anh,H
AU - Inchauspe,H
AU - Kayser,P
AU - Lala,S
AU - Laemmerzahl,C
AU - Lebat,V
AU - Leseur,P
AU - Liorzou,F
AU - List,M
AU - Loeffler,F
AU - Panet,I
AU - Pouilloux,B
AU - Prieur,P
AU - Rebray,A
AU - Reynaud,S
AU - Rievers,B
AU - Robert,A
AU - Selig,H
AU - Serron,L
AU - Sumner,T
AU - Tanguy,N
AU - Visser,P
DO - 10.1103/PhysRevLett.119.231101
PY - 2017///
SN - 0031-9007
TI - MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle
T2 - Physical Review Letters
UR -
UR -
VL - 119
ER -