Step (satellite test of the equivalence principle)

T.J. Sumner, J. Anderson, J.P. Blaser, A.M. Cruise, T. Damour, H. Dittus, C.W.F. Everitt, N.A. Lockerbie, Colin Pegrum

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)


STEP is one of a number of missions now being developed to take advantage of the quiet space environment to carry out very sensitive gravitational experiments. Using pairs of concentric free-falling proof-masses, STEP will be able to test the equivalence principle (EP) to a sensitivity at least five orders of magnitude better than currently achievable on ground. The EP is a founding principle of general relativity and STEP is the most sensitive experiment of this type planned so far, aiming at 1 part in 1018. 2007 Published by Elsevier Ltd on behalf of COSPAR.
Original languageEnglish
Pages (from-to)254-258
Number of pages4
JournalAdvances in Space Research
Issue number2
Publication statusPublished - 2007


  • STEP
  • equivalence principle
  • gravitational experiments
  • general relativity


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