Astronautics Vocabulary

The Astronautics Vocabulary is a glossary of terms that pertain to the science and technology of spaceflight. This alphabetical list can be navigated by clicking on the letters A-Z displayed on this page.

Definition of Fine Guidance Sensor (FGS)

Translation: détecteur de guidage de précision

Definition: Instrument composed of mirrors, lenses, prisms, servo motors, and beam-splitters that direct the Hubble space telescope to point at a stellar target and lock it into position relative to the object.

Other Definition: None

Synonym: None