sun, name

If a solar system has one inhabited planet, the sun’s name is the one used on that planet.  Our Sun has the name used on Earth – Sol.

If a solar system has no inhabited planets, the sun’s name is usually the one given by the nearest inhabited planet.  Three suns near Earth have no inhabited planets.  Earth is the nearest inhabited planet, so the Federation uses Earth’s name for them – Proxima Centauri, Alpha Centauri A, and Alpha Centauri B.

If a solar system has more than one inhabited planet, their leaders must agree on a name for their sun.

If people settle on a planet whose sun has no name, they may give it a name.