Lagna: the Vedic reading of the ascendant

Vedic astrology calls the ascendant the lagna, and treats it as the foundation of the entire reading rather than as one of three headline placements.

Why it outranks the Sun

In Vedic practice the chart is read from the lagna outward. Houses are counted from it, strength is judged relative to it, and the lagna lord is examined before almost anything else. The Sun matters, but a Vedic astrologer asked for your sign is more likely to mean your Moon sign or your lagna than your Sun.

Whole sign, and why it simplifies things

Vedic charts use whole sign houses almost universally. The sign containing the lagna is the entire first house, the next sign is the entire second, and so on. There is no argument about cusps and no planet sitting ambiguously between two houses.

That is also why a Vedic chart and a Placidus Western chart can disagree about which house a planet is in even before the ayanamsa is applied.

The lagna lord

The planet ruling the lagna sign carries the self through the chart. Its house placement is read as where your life energy goes, its strength as how easily, and its dasha period as a stretch when your own affairs come to the front.

The sidereal shift

Because the sidereal zodiac sits about 24 degrees behind the tropical one, your Vedic lagna is often the previous sign from your Western rising sign. Both are describing the same horizon at the same instant, measured from different starting points.