AST-598intermediate

Astrometry & Transit Timing Variations: Physical Mechanisms

Astrometry and transit timing variations detect planets through changes in stellar position or in the timing of other planets rather than through brightness depth or Doppler speed alone. These methods reveal orbital inclination, true planet mass, unseen companions, resonant architecture, and planetary masses in compact multiplanet systems.

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Astrometry & Transit Timing Variations: Physical Mechanisms

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AST-597Astrometry & Transit Timing Variations: Structures & Vocabulary→

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AST-599Astrometry & Transit Timing Variations: Observation, Measurement & Evidence→

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Astrometry and transit timing variations detect planets through changes in stellar position or in the timing of other planets rather than through brightness depth or Doppler speed alone.

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A companion displaces the host star around the center of mass, producing an angular wobble whose size increases for massive planets on wider orbits and nearby stars.