Twenty-seven addresses for the Moon
Long before the twelve signs settled into Indian practice, sky-watchers tracked the Moon, which circles the whole zodiac in about 27 days. So they cut the circle into 27 equal nakshatras — lunar mansions — of 13°20′ each. The Moon crosses roughly one per day: its nightly address.
27 × 13°20′ = 360° exactly. The grid tiles the zodiac with nothing left over.
Two and a quarter per sign
Divide 30° by 13°20′ and you get 2¼ — every sign holds exactly two and a quarter nakshatras. The two grids interlock rather than nest: some nakshatras sit wholly inside one sign, but others straddle a boundary as if the sign edge were not there.
Krittika runs 26°40′ Aries to 10°00′ Taurus — one nakshatra, two signs.
Ashwini to Revati, pinned to real stars
The count starts at 0° Aries with Ashwini and ends at 30° Pisces with Revati. Several carry a bright anchor star: Rohini holds Aldebaran, and Chitra holds Spica — the very star the Lahiri ayanamsa is calibrated against. The sidereal zodiac from lesson 1-3 is literally pinned to a nakshatra.
Ashwini, Rohini, Chitra, Revati — four names worth knowing before all 27.
Nine rulers, three laps
Each nakshatra has a graha as its lord, assigned in one fixed rotation: Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury. Nine lords, run three times, cover all 27. Ashwini takes Ketu, Bharani Venus, Krittika the Sun, Rohini the Moon — and the wheel keeps turning.
Position 10 starts the second lap: Magha, like Ashwini, belongs to Ketu.
This sequence is your timing system
Memorize that rotation now, because it is exactly the order of vimshottari dasha — the planetary-period system that is module 6's master timing tool. And the dasha you are born running starts from your Moon's nakshatra: the janma nakshatra, your birth star. The lunar grid is the clock's face.
Moon in Rohini at birth: your life opens inside a Moon dasha.
Read the symbol, not a catalogue
Each nakshatra carries a symbol, a deity, and a quality — read them together instead of memorizing 27 keyword lists. Ashwini: a horse's head, the physician Ashvins — speed, rescue, healing, quick starts. Rohini, 'the red one': a cart of growing things, deity Brahma the creator — fertility, beauty, lush increase.
Ask of the image: what does it do? Horses run and rescue; the cart swells with harvest.
The one idea to keep
Signs are the solar grid; nakshatras the lunar grid
Twelve signs track the Sun's year; twenty-seven nakshatras track the Moon's month — finer, older, and the clock behind every dasha you will ever compute. When timing matters, jyotisha reaches past the sign to the nakshatra underneath it.