ราศี Rasi
Commencing in Aries and concluding in Pisces, the 12 Rasi are suspended across the celestial ecliptic, encircling the Earth. Commonly known aspects of astrology, the Rasi are part of the backdrop in which one can calculate and study time.
Years and months are based on the progression of the Sun through the 12 Rasi. The Sun moves through the Rasi one degree per day, taking 30 days for one Rasi and 12 cycles for the whole zodiac. This makes 360 days or one solar year.
Like all other aspects of Astrology, each Rasi has its own characteristics and significations. In addition, each Rasi is ruled by one or more of the planets and holds domain over part of the human body for use in medical astrology.
By j-journey - Own work, Public Domain, https://www.j-journey.com/j-blog/wp-content/uploads/2017/06/12-zodiac-months-no-months.jpg
Aries
Domain: Head
Element: Fire
Planetary Ruler: Mars
Taurus
Domain: Neck
Element: Earth
Planetary Ruler: Venus
Gemini
Domain: Shoulder/Arms
Element: Wind
Planetary ruler: Mercury
Cancer
Domain: Chest
Element: Water
Planetary ruler: Moon
Leo
Domain: Torso
Element: Fire
Planetary ruler: Sun
Virgo
Domain: the abdomen
Element: Earth
Planetary ruler: Mercury
Libra
Domain: Waist and Hips
Element: Wind
Planetary ruler: Venus
Scorpio
Domain: Genitals
Element: Water
Planetary Ruler: Scorpio and Ketu
Sagittarius
Domain: Thighs
Element: Fire
Planetary ruler: Jupiter
Capricorn
Domain: Knees
Element: Earth
Planetary ruler: Saturn
Aquarius
Domain: Shanks/calves
Element: Wind
Planetary ruler: Saturn and Rahu
Pisces
Domain: The feet
Element: Water
Planetary ruler: Jupiter
A page from Michael of Rhodes' biographical manuscript, documenting his four decades of sea voyages, ca. 1445. The image relates to bloodletting, which was practiced according to the night sky's ruling sign — Source