Sun rules the government sector and raja sambhantha karyas. Any thing related to the goverment requires the support of the planet Sun. Sun rules the sign Leo (Simham). It is exalted in Aries (Mesham) sign and debilitated in Libra(Thulam) Sign. Sun rules heart, blood, brain and right eye for men, left eye for women.
When sun is a benefic planet on a chart, the native will be successful in raja sambhantha karyas during Sun Mahadasha. It does also support immigration to another counry. Sun is very important to have your career in politics. When sun is very much favorable and exalted, the person can even become a minister on the country during Sun mahadasa. The strong position of Sun makes a person to attain perfect and respectful position in his or her life. Wealth accumulation during sun maha dasa depends on the house it rules with respect to lagna. In either case, Sun mahadasa can not give significant amount of wealth rather it makes the person so popular and he or she will have great respect from people in the society.
When sun is not placed well in a horoscope, the person will suffer with full of problems. He or she will have poor and ill health, no respect in the society, problems from the government officials, etc.
Sun Mahadasha can offer great positive results to the people born in Mesha (Aries), Kataga (Cancer) and Simha (Leo) lagna people. People born in Makara (Capricorn) and Thula (Libra) lagna people will experience the worst results of Sun Mahadasha. But this is a general rule and there are lots of exceptions. It depends on the placement of Sun and its aspects with other planets.
The timespan of Sun Maha Dasa is 6 years. The timespan of antardasha (bukthi or subperiod) is given below:
Sun (Surya) Antardasha (Bukthi)
The timespan is about 3 months and 18 days that is 110 days.
Moon (Chandra) Antardasha (Bukthi)
The timespan is about 6 months that is 183 days.
Mars (Chevvai / Mangal / Kuja) Antardasha (Bukthi)
The timespan is about 4 months and 5 days that is 128 days.
Rahu Antardasha (Bukthi)
The timespan is about 10 months and 23 days that is 329 days.
Jupiter (Guru) Antardasha (Bukthi)
The timespan is about 9 months and 17 days that is 292 days.
Saturn (Sani) Antardasha (Bukthi)
The timespan is about 11 months and 12 days that is 347 days.
Mercury (Budha) Antardasha (Bukthi)
The timespan is about 10 months and 5 days that is 311 days.
Ketu Antardasha (Bukthi)
The timespan is about 4 months and 3 days that is 128 days.
Venus (Sukra) Antardasha (Bukthi)
The timespan is about 12 months that is 365 days.