Perigalacticon
Encyclopedia
Perigalacticon is an apsis
. It is the point in a star's orbit around a galaxy when it lies closest to the galactic center. The Sun
is presently near its perigalacticon. Perigalacticon may also refer to a galaxy's closest point (Galactocentric distance
) as it orbits another galaxy.
Apsis
An apsis , plural apsides , is the point of greatest or least distance of a body from one of the foci of its elliptical orbit. In modern celestial mechanics this focus is also the center of attraction, which is usually the center of mass of the system...
. It is the point in a star's orbit around a galaxy when it lies closest to the galactic center. The Sun
Sun
The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...
is presently near its perigalacticon. Perigalacticon may also refer to a galaxy's closest point (Galactocentric distance
Galactocentric distance
Galactocentric distance is a star's distance from the center of a galaxy. For example, our Sun is about 27 kly from the center of the Milky Way. Galactocentric distance may also refer to a galaxy's distance from another galaxy....
) as it orbits another galaxy.