Your starting coordinates
The Sun, Moon and ascendant describe different functions. None is a complete personality on its own.
NATAL SKY · FREE CALCULATOR
Your birth sky, without the guesswork.
A birth chart is more than a Sun sign. Calculate your Sun, Moon, rising sign and houses, then see which annual chapter is active now.
FREE TO STARTNO CREDIT CARDVISIBLE METHOD
MORE THAN THE BIG THREE
A chart is a system, not a list of labels.
Where a theme appears
Houses organize the chart into areas of life. Their calculation depends on a sufficiently reliable birth time.
Which chapter is active
Moira adds annual timing so the chart becomes a living map rather than a static description.
CALCULATION AND UNCERTAINTY
What your birth time changes.
The planets occupy zodiac positions at every moment. Date and place let us calculate much of that sky, while the exact time connects it to the local horizon.
When the time is known
Moira can calculate the ascendant, houses and day-or-night distinction more precisely. Historical time-zone handling matters as much as the city name.
When the time is unknown
We do not invent an ascendant. The Sun and slower planets usually remain available, while the Moon may require a range check if it changed signs that day.
Why results can differ between calculators
Rounded times, incorrect historical time zones, different house systems or a birth near a sign boundary can produce different outputs. Moira keeps the calculation evidence visible.
FREQUENTLY ASKED QUESTIONS
Before you calculate your chart.
Do I need an account?
No. You can calculate the opening result first and decide later whether to save it.
Is astrology a prediction?
Moira treats astrology as a reflective framework. A chart or transit does not guarantee an event or replace professional advice.
Which house system does Moira use?
Moira's timing architecture is built around classical whole-sign houses and explains the evidence behind the reading.
Can I calculate a chart without a birth time?
Yes, with limits. Moira clearly marks the ascendant and house information that cannot be established reliably.
YOUR SKY AT BIRTH