What was the ruler, the first house? But there is no first house in the astrolabe.

If you are talking about astrology in western astrology, then the main star is the main star of the first house, and the first house is actually determined by your rising constellation!

If you become a lion and the first house is ruled by Leo, then your destiny is the sun! -If there are no stars in the first house, it won't change the above conclusion!

You can also see the first house from the astrolabe, which is generally marked with Arabic numerals ~