Comparison
Stellr vs Co-Star
Co-Star made astrology mainstream. But it uses the tropical zodiac — which hasn't matched the actual sky in 2,000 years. Here's what you're missing.
Why it matters
Your "sign" might be wrong
Due to the precession of the equinoxes, the tropical zodiac (used by Co-Star) is now about 24 degrees off from the actual star positions. If Co-Star says you're a Scorpio, Vedic astrology likely places you in Libra. Your entire chart — sun, moon, rising, all planets — shifts.
The deeper system
Dasha timing changes everything
Co-Star shows transits — where planets are now. Stellr adds Vimshottari Dasha: a 120-year timeline of planetary periods that reveals when major life events are most likely. A transit might last weeks. A dasha period shapes years.
Frequently asked questions
What is the main difference between Stellr and Co-Star?
Stellr uses Vedic sidereal astrology with the Lahiri ayanamsa and Swiss Ephemeris DE431 for NASA-grade precision. Co-Star uses Western tropical astrology, which does not account for the precession of the equinoxes and is currently about 24 degrees off from actual star positions.
Will my zodiac sign be different on Stellr vs Co-Star?
Yes. Because tropical and sidereal zodiacs differ by roughly 24 degrees, your sun sign, moon sign, and ascendant will likely shift. For example, if Co-Star says you are a Scorpio, Stellr may place you in Libra. All planetary positions shift accordingly.
Does Stellr offer features that Co-Star does not?
Stellr provides 16 divisional charts (Vargas), Vimshottari Dasha predictive timelines, Ashtakoota compatibility scoring, and classical BPHS interpretations. Co-Star focuses on transit-based daily updates and psychological astrology without dasha timing or divisional charts.