The Sun represents vitality, indivi

The Sun represents vitality, individuality, will-power and creative energy and honours. For a woman, it also represents her father, and later her husband. The Sun is one of the most important symbols in the birth chart, as much as the Ascendant, then the Moon (a bit less for a man), the ruler of the Ascendant and the fast-moving planets.
It's element is fire; it is hot and dry, it governs Leo, is in exaltation in Aries and is in analogy with the heart. It represents the boss, authority, beside the father and the husband ; the age of the Sun goes from 20 years old to about 40, following the Venus age when one is aware of his seductive power.
Temperament : Bilious
Characterology : Emotive, Active, Secondary, passionate type.
Sun in Scorpio
You constantly strive to keep your self-control and to resist external pressures. Your phlegm actually conceals unusual intense emotions. A hidden force that gives you an inclination for struggles, for difficult or extremist causes, inhabits you. You may display a sarcastic and caustic mind, and in the worst cases, you may be destructive. But your resistance abilities prove valuable when the situation goes awry. Scorpio does not mind the sign’s “bad reputation”, moreover, he is proud of it, he claims it and he scoffs at it. Most certainly, he has nothing to do with ordinary mortals. You are very sensitive to power struggles. You try to use your adversary and to combine opposing elements. You resort to scheming and to manipulation. You use a person to hit another and you use the latter to charm a third party. Scorpio is a fine strategist, a born politician. Far from breaking him down, adversity stimulates Scorpio’s creativity. Better than anyone, you can handle crises that imply fighting spirit, subtlety in confrontations and challenge. Your forte? You express your powers to their fullest, you master the art of straightening out endangered situations and you dramatically reverse the interests at stake.
Sun in House X
With the Sun in the 10th House, you pay high attention to your social image, you try to have your capacities acknowledged, and you want to arouse respect and admiration. In a word, you want to find your place in the sun. It is not that easy... Whereas successes increase your enthusiasm and your efficiency tenfold, failures may get you disheartened. Therefore, it is preferable to make your task easier, and to reinforce your self-confidence which may be weak. Your fulfilment depends on your social success, and on getting other people's recognition.
Sun Dominant
If the Sun is part of your natal chart's planetary dominants, in astrology, you are said to be a Solarian: you loathe pettiness and Machiavellian manoeuvre, and you are fond of natural nobleness as well as of direct and honest attitudes. You endeavour to get out of muddled or dark situations as quickly as possible. Your need for transparency may lead you to make cut-and-dried judgments such as yes or no, and black or white. However, your honesty commands your entourage's consideration. At times, you come across as authoritarian. It is true that you never want to be thought of the notable absentee, and that you manage to make people pay attention to you, as well as to your plans and your assessments. To this end, the Solarian sometimes develops a great talent for placing himself under the spotlight without missing a single opportunity to arouse interest. Some other Solarians, although more discreet, still manage to be the focus of any debate, even in situations of exclusion. It is your way of being present even though you are actually not there... More than other people, you appreciate the esteem extended to you. It is useless to cheat with you, since in all areas you consider establishing enduring relationships only with those who love you, admire you, respect you, or express some degree of affection to you. Your will to straighten out your inter-personal relationships is your strength and sometimes, your Achilles' heel.