Well, I don't know about the "sun" and "rising" stuff is, but matching them is quite simple. An Aries has the element of fire, meaning that zodiac will go best with any of it's corresponding elemental allies, like Leo, or Sagittarius. With a Capricorn, it's the same thing: go with the elements. In this case, however it has the earth sign and goes with its corresponding zodiacs, Taurus and Virgo.