perigalacticum

English

Noun

perigalacticum (plural perigalactica)

1. (astronomy) The closest point in a star's orbit around the centre of a galaxy (the galactic periapsis).
   • 1981, George Ellis Williams, Megacycles: Long-term Episodicity in Earth and Planetary History:

     During the late Cenozoic glaciation, high-latitude glaciation started in the Miocene 14 m.y. ago, and the sun is presently 8 + 4 m.y. from the perigalacticum.