The Sun stands for inner identity and a sense of self;
The Moon represents our fluctuating emotions, and our everyday-personality;
and the Ascendant is our outer expression.

You must be the textbook Capricorn:
earthy nature; no-nonsense approach to all of your endeavours; very emotional deep down yet always in control of your feelings; may be difficult for outsiders to approach but forever loyal and steadfast to the people you hold dear; may be perceived as cold and detached while in truth you are just uncomfortable with open display of emotions; career and/or status-oriented in some way or another