Sun, Moon, and Rising Sign in One Kundli

The Sun stays in a sign about a month. The Moon changes sign about every two and a quarter days. The lagna changes on the order of a couple of hours, and the signs do not rise for equal lengths, so the birth city and the zone offset matter. A column that calls you by the Sun sign has named the slowest of the three and ignored the horizon. In Jyotish the horizon wins the houses. A Leo Sun with a Capricorn lagna lives in a Saturn chart, because Capricorn's lord is Saturn and the 10th lord and the 1st lord are counted from Capricorn.

The Sun decides father, government, and self-command, and it exalts in Aries and debilitates in Libra. The Moon decides the mind, the mother, the nakshatra that opens the dasha, and the sign from which Sade Sati is counted. The lagna decides the 7th of marriage and the 10th of career. Mixing them produces a confident wrong answer. You can be a Sun-in-Libra person, with the Sun debilitated, and still have a strong lagna lord in the 10th. The career is the lagna's 10th, not the Sun sign's reputation.

Houses are sometimes counted from the Moon, and that count is called Chandra lagna. It is used for gochar and for a second opinion on the mind's life. It does not replace janma lagna. If the Moon is in the 4th from the rising sign, the Chandra lagna's 7th is a different sign from the birth 7th. Marriage matching that uses only the Moon, the 36 guna points, is this lunar count. The wedding years still come from the birth 7th lord's dasha.