The position of Sun in the 1st house is considered to be quite significant from the perspective of Vedic astrology. This particular placement is believed to give a lot of power and authority to the individual. For people born with Sagittarius ascendant, if the Sun is placed in their 1st House, then it is considered to be in a friend sign state. This would have a positive impact on the overall astrological predictions.
Firstly, it should be noted that Sun is the natural karaka or significator of houses related to self-identity and career. Therefore, when Sun is placed in the first house for Sagittarius Ascendant individuals, they are likely to be highly ambitious and driven towards achieving their goals. Their sense of self-worth can also be quite high, which can make them appear arrogant or overconfident at times.
However, given that Sun is also lord of the 9th house for these individuals, they are likely to experience an increased inclination towards spiritual pursuits as well. They may have a strong connection with their roots and may practice religion or spirituality as a means of finding meaning and purpose in life.
Since Sun is aspecting the 7th house for Sagittarius Ascendant individuals with this placement, they may face challenges in their relationships. While they may be highly ambitious and career-oriented themselves, their partner may not share these same values. Hence it becomes essential for them to seek out a partner who has similar values and goals in life.
Another aspect that needs attention here is that since Sun rules over two essential houses - the ninth house (which relates to higher education) and the tenth house (linked with career), people with this placement could achieve success through careers which involve higher learning or teaching fields like professors or gurus.
Moreover, because this placement makes an individual's personality shift more towards authoritative tones it helps them become great leaders irrespective of industry/field. Also, since they are so focused on their goals, their intellect and prioritization make them extremely suited for great jobs which involve delegating authority.
In conclusion, Sagittarius Ascendant people with Sun placed in the first house can be expected to have a robust personality with a deep sense of purpose. They will hold a strong connection with their roots and may show an inclination towards spirituality. Their high levels of ambition and self-confidence should help fuel their success in their chosen careers, especially those related to higher education or teaching fields. However, it is vital that they take care not to let this ambition overshadow other important aspects of life, like relationships. Overall, this is a very promising placement for individuals looking to achieve success in both personal and professional spheres of life.