Astrology is a system for interpreting the positions of the sun, moon and planets at a given moment, most often the moment someone was born. The chart it produces is a map of that sky. What an astrologer does with the map is interpretation, and that is where the craft, and the disagreement, lives.

The four things a chart is made of

  • Planets stand for drives and functions: sun for identity, moon for emotional habits, Mercury for thinking and speech, Venus for attachment and taste, Mars for drive and conflict, and the slower outer planets for longer arcs.
  • Signs describe the style in which a planet operates. Mars in Virgo works differently from Mars in Leo.
  • Houses are twelve divisions of the chart tied to areas of life: work, home, partnership, money. They depend on your exact birth time, which is why an astrologer keeps asking for it.
  • Aspects are the angles between planets, the relationships that make a chart hang together rather than read as a list.

Sun sign astrology is a small corner of it

Newspaper horoscopes use one factor, the sun sign, and apply it to a twelfth of the population. Working astrologers treat that as shorthand at best. A full chart has roughly forty moving parts, which is why two people born on the same day but four hours apart get read differently.

What astrologers actually do in a session

A natal reading walks through the chart as a whole and usually lasts an hour to ninety minutes. Other common formats are transits, meaning current planetary positions against your chart, used for timing; synastry, comparing two charts for a relationship; and electional work, picking a date for something like a launch or a wedding.

Expect $80 to $250 for a first natal reading in the United States. A recording is usually included. You will need date, exact time and place of birth. If the time is unknown, say so early; some astrologers will rectify it from life events, others will read a chart without houses and tell you what that costs you in precision.

Traditions differ, and that is normal

Western tropical astrology, the mainstream in Europe and the Americas, measures from the equinox. Vedic or sidereal astrology, dominant in India, measures against the fixed stars, so the same person often gets a different sun sign. Hellenistic and traditional revivals have grown in the last two decades and use older techniques with fewer planets. None of these is a version of the others, so ask which one a reader works in before you book.

What the evidence says

Attempts to test astrological claims under controlled conditions have not supported them. The best known is Shawn Carlson's double-blind study published in Nature in 1985, in which astrologers matched charts to personality profiles at chance rates. Later reviews reached similar conclusions. Scientific bodies treat astrology as unsupported by evidence.

People still find readings useful, and there is no contradiction in saying both things. A good astrologer gives you a structured vocabulary for talking about your own patterns and timing, which is often what someone booking a reading actually wants.

Getting a useful reading

Bring your birth certificate time rather than a family memory, come with two or three specific questions, and ask the astrologer what the chart does not tell them. Decisions about health, law and money need professionals in those fields; a responsible astrologer says so without being asked.

If you want to compare people near you, our astrologer listings are organised by state and city with contacts and client reviews. For timing questions that lean on numbers rather than planets, a numerologist works differently and some clients prefer it.