Astrology Glossary

Cancer

Cancer is the fourth zodiac sign, ruled by the Moon, known for emotional depth, intuition, and a strong connection to home and family.

Cancer is the fourth sign of the zodiac, spanning from approximately June 21 to July 22. Represented by the Crab, it is a water sign ruled by the Moon. Cancer energy is nurturing, protective, and deeply emotional. People with strong Cancer placements often value security, family, and tradition, and they possess a natural ability to care for others.

How it works

In a natal chart, the sign Cancer occupies a specific house, coloring that area of life with its qualities. For example, if Cancer is on the 4th house cusp, home and family life are especially important. The Moon, Cancer's ruler, also plays a key role: its sign and house placement refine how Cancer energy expresses. A Cancer Sun person may be sensitive and intuitive, while a Cancer Moon amplifies emotional receptivity. Aspects to the Moon or planets in Cancer can indicate how easily emotions flow or where defensiveness arises.

In practice

When interpreting Cancer in a chart, notice the Moon's sign and aspects first. Cancer's cardinal quality gives it initiative in emotional matters—these individuals often take the lead in creating a safe environment. In synastry, Cancer placements can indicate a strong need for emotional bonding and may show up as caretaking or clinginess. During transits through Cancer (like the Moon's monthly visit or Jupiter's yearly passage), themes of home, family, and emotional security come to the forefront.

For more about your own placements, explore your natal chart.

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Related terms

zodiac-signspriority-p1glossarycancermoonwater-sign