Your star chart, read with reverence
Astra inclinant, sed non necessitant — the stars incline, but they do not compel.
High-precision celestial geometry computed via the Swiss Ephemeris. Enter your birth details below to calculate your placements, houses and aspects.
Calculate Your Star Chart
Discover your exact planetary alignments, rising sign, and astrological houses with Swiss Ephemeris precision.
Birth chart questions
What are the "Big Three" in a natal chart?
Your Big Three comprise your Sun sign (core identity, creative vitality, ego purpose), your Moon sign (emotional sanctuary, instinctual responses, somatic needs), and your Ascendant or Rising sign (your worldly interface, physical embodiment, and initial filter of perception).
Can I generate a natal chart without my exact birth time?
Yes. Check "Exact birth time unknown" or enter 12:00 PM to calculate a solar chart. While your exact Ascendant degree and house cusps require a precise minute of birth, your Sun sign, Moon sign, planetary signs, and planetary aspect geometry remain largely accurate.
Why do some astrologers prefer Whole Sign houses over Placidus?
Whole Sign houses—the traditional Hellenistic method—treat each 30° zodiac sign as an entire house beginning at 0°, eliminating intercepted houses in higher latitudes and providing unambiguous planetary rulerships. Placidus divides houses based on the time required for degrees to cross the celestial meridian, creating unequal houses tailored to geographic latitude.