Astrometry

Astrometry is a branch of astronomy that deals with the positions of stars and other celestial bodies, their distances and movements.

Astrometrics

Astrometrics is the science of stellar measurements and motion. Astrometrics was used, during the 1990s, to detect extrasolar gas giants orbiting various solar systems. This was done by observing the "stellar wobble" of a star and calculating what kinds of gravitational forces would cause such motion; it was then determined that planetary forces must be affecting the stars in question.

Related Topics:
Science - Stellar - Measurement - Motion - 1990 - Extrasolar - Gas giant - Orbit - Solar system - Stellar wobble - Gravitational - Force - Planet

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