What sort of navigation-system do you guys use ? What do you call such a system ?
A co-ordinate-system ? Navigation-system ? Co-Ordinate Navigation-System ? (etc.)

I «prompted» Co-Pilot just now and here is my prompt along with its response...
Prompt: «So, like, upon a planet, like Earth, the co-ordinate-system tends to revolve around NSEW, NE, NW, SE, SW, etc., but, for an outer-space co-ordinate system, well, how would directions be designated ?»

According to Co-Pilot...:
「In outer space, the coordinate system is quite different from the traditional compass directions used on Earth (North, South, East, West). Here are a few key systems used for designating directions in space:

Equatorial Coordinate System
Celestial Equator: Analogous to Earth's equator, an imaginary line around the sky directly above Earth's equator.

Right Ascension (RA): Similar to longitude on Earth, measured in hours, minutes, and seconds eastward from the Vernal Equinox.

Declination (Dec): Similar to latitude on Earth, measured in degrees, minutes, and seconds north or south of the celestial equator.

Galactic Coordinate System
Galactic Latitude (b): Measures the angle above or below the plane of the Milky Way galaxy.

Galactic Longitude (l): Measures the angle around the plane of the Milky Way, starting from the galactic center.

Ecliptic Coordinate System
Ecliptic Latitude (β): Measures the angle north or south of the ecliptic plane (the plane of Earth's orbit around the Sun).

Ecliptic Longitude (λ): Measures the angle along the ecliptic plane from the Vernal Equinox.

Heliocentric and Geocentric Systems
Heliocentric Coordinates: Centered on the Sun, used for mapping the solar system.

Geocentric Coordinates: Centered on Earth, used for near-Earth objects and satellites.

Example:
In the equatorial coordinate system, if you wanted to point to a specific star, you might say its coordinates are:

RA: 14h 39m 36s
Dec: +13° 29′ 52″

These systems provide a precise and standardized way to locate objects in the vastness of space.

Does this help clarify how directions are designated in space? 🌌✨ Let me know if you have more questions!」

I would also like to ask about other galaxies & their distances, but, baby-steps first...