About the Cancer zodiac sign
Cancer — the Crab — is the cardinal water sign of the zodiac, ruled by the Moon. Cancer energy is protective, emotionally attuned, and built around family, home, and chosen kin. Famous Cancer celebrities include Princess Diana, Tom Hanks, Tom Cruise, Frida Kahlo, and Ariana Grande. The Cancer signature is a public softness that hides surprisingly strong instincts — Cancers are the cardinal sign of water for a reason.
How Cancer sun signs are determined
A Cancer Sun sign means someone was born when the Sun was in Cancer (June 21 - July 22). The Moon — Cancer's ruler — defines emotional baseline; the fourth house (home) is also central to reading a Cancer chart.