The capital was actually just a general term; it was more accurate to call it a capital ring. That was because twenty-three habitable planets, as well as seven militarized planets, were all located in the Venal galaxy and made up what was known as the capital.
Earth was merely the only habitable planet in the Milky Way, while the Venal galaxy had a total of fifty-one planets, with twenty-nine of them being habitable. It was simply God's gift to mankind.
Every single planet had its set of coordinates. Venal-17 was where the Alliance Congress, Alliance Parliament, and Supreme Court; in fact, most government agencies were based on this planet.
Venal-20 was the Alliance's commercial hub, filled with pretty much the headquarters of all the heavyweight banks, securities firms, and financial companies.