GP-B
E817763
GP-B is a NASA space experiment designed to test key predictions of Einstein’s general theory of relativity by measuring tiny changes in the direction of ultra-precise gyroscopes in Earth orbit.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
physics experiment
ⓘ
relativity experiment ⓘ satellite ⓘ space experiment ⓘ |
| alsoKnownAs | Gravity Probe-B NERFINISHED ⓘ |
| countryOfOperator |
United States of America
ⓘ
surface form:
United States
|
| dataAnalysisEnd | 2011 ⓘ |
| developedBy |
Lockheed Martin
NERFINISHED
ⓘ
Stanford University NERFINISHED ⓘ |
| fullName | Gravity Probe B NERFINISHED ⓘ |
| fundedBy | NASA NERFINISHED ⓘ |
| launchCountry |
United States of America
ⓘ
surface form:
United States
|
| launchDate | 2004-04-20 ⓘ |
| launchSite | Vandenberg Air Force Base NERFINISHED ⓘ |
| launchVehicle | Delta II NERFINISHED ⓘ |
| measuresQuantity |
frame-dragging precession rate
ⓘ
precession of gyroscopes ⓘ space-time curvature near Earth ⓘ |
| missionDuration | approximately 1.5 years of science operations ⓘ |
| missionType | space-based test of general relativity ⓘ |
| operatedBy |
NASA
ⓘ
NASA Marshall Space Flight Center NERFINISHED ⓘ Stanford University NERFINISHED ⓘ |
| orbitCharacteristic |
circular orbit
ⓘ
polar orbit ⓘ |
| orbitInclination | 90.0 degrees ⓘ |
| orbitType | low Earth orbit ⓘ |
| pointsTo | guide star IM Pegasi ⓘ |
| predecessor | Gravity Probe A NERFINISHED ⓘ |
| primaryObjective | test predictions of Einstein’s general theory of relativity ⓘ |
| relativityPredictionTested |
Lense–Thirring frame-dragging effect
GENERATED
ⓘ
geodetic precession of gyroscopes in Earth’s gravitational field GENERATED ⓘ |
| resultSummary |
confirmed geodetic effect within expected uncertainty
ⓘ
detected frame-dragging effect with larger uncertainty ⓘ |
| sciencePhaseEnd | 2005-08 ⓘ |
| scientificField |
general relativity
ⓘ
gravitational physics ⓘ |
| spaceAgencyProgram | NASA Gravity Probe program NERFINISHED ⓘ |
| spacecraftBus | custom drag-free spacecraft ⓘ |
| status | mission completed ⓘ |
| targetStar | IM Pegasi NERFINISHED ⓘ |
| technologyFeature |
drag-free satellite control system
ⓘ
superconducting gyroscopes ⓘ superfluid helium dewar ⓘ |
| testsEffect |
frame-dragging
ⓘ
geodetic effect ⓘ |
| usesInstrument |
cryogenic gyroscopes
ⓘ
onboard telescope ⓘ ultra-precise gyroscopes ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Gravity Probe B