Question 1

What is a natal chart?

Accepted Answer

A natal chart (also called a birth chart) is a map of the sky at the exact moment and location of your birth. It shows the positions of the Sun, Moon, and planets across the twelve zodiac signs and houses, and the angles (aspects) they form with each other. Astrologers use the natal chart to understand personality, life themes, strengths, and challenges.

Question 2

Is this natal chart calculator free?

Accepted Answer

Yes. Star System is completely free to use. Enter your birth date, time, and city to generate your full natal chart with interpretations for every placement. You can create a free account to save your chart and export a full PDF reading.

Question 3

Do I need my exact birth time?

Accepted Answer

An exact birth time gives you the most accurate chart, including your Rising sign (Ascendant) and house placements. If you don't know your birth time, you can still generate a chart using 12:00 PM as a default — your Sun, Moon, and most planetary placements will still be accurate, but house positions and the Rising sign will not be reliable.

Question 4

What does a birth chart tell you?

Accepted Answer

Your birth chart describes the energies you were born with — how you think, feel, love, and move through the world. Each planet represents a different part of your psyche: the Sun is your core identity, the Moon is your emotional nature, Mercury is how you communicate, Venus is what you value and desire, Mars is how you take action, and so on. The sign each planet occupies colors its expression, and the house it falls in shows which life area it most influences.

Question 5

What are aspects in astrology?

Accepted Answer

Aspects are the angular relationships between planets in your natal chart. The major aspects are the conjunction (0°), opposition (180°), trine (120°), square (90°), and sextile (60°). Harmonious aspects like trines and sextiles indicate areas of natural ease and flow, while challenging aspects like squares and oppositions describe tension that often drives growth and achievement.

Question 6

Can I export my birth chart as a PDF?

Accepted Answer

Yes. Create a free account on Star System and you can export a full PDF reading of your natal chart, including interpretations for every planet in its sign and house, plus your major aspects. The PDF can be downloaded and shared.

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