The Cancer constellation is one of the dimmest in the night sky; its most recognizable and easily seen feature is a cluster of stars known as the Beehive Cluster. In the 1st century AD, the astrologer Manilius wrote: "Shining at the hinge of the year by the blazing turning-point which when recalled the Sun rounds in his course on high, the Crab occupies a joint of heaven and bends back the length of day."
Where Is Cancer in the Night Sky?
Cancer lies between the constellations Gemini and Leo. It's best seen in the Northern Hemisphere sky in late winter and early spring and again in the morning sky starting in September. It's popularly recognized by its most distinguishing feature, Praesepe (Latin for manger), commonly called the Beehive cluster.
Cancer Constellation Drawing
You'll be hard-pressed to identify the Cancer constellation as a Crab; as a matter of fact, you'll likely see something that looks more like a faint upside-down Y. It's the dimmest of the 13 zodiac constellations and is almost impossible to see with the naked eye or even binoculars.
Probably the easiest way to locate the Cancer constellation is with a sky map that's set for your specific sky watching location.
- The Starmap app, available at the Apple App Store, can turn your smartphone into a constellation finder.
- The Skyview app allows you to point your iPhone at the sky to identify stars, constellations, and satellites.
Astrology and Astronomy
Astrology and astronomy use different systems that divide the sky in different ways.
The Constellation Zodiac and Cancer
Of the 88 constellations whose boundaries were defined by The International Astronomical Union (IAU) in 1930, thirteen of the 88 touches on the Earth's ecliptic. Astronomers call these the constellation zodiac. The Sun passes in front of the constellation zodiac's Cancer from approximately July 20 - August 10.
The Tropical Zodiac and Cancer
The signs of the Tropical Zodiac, every 30 degrees of arc along the ecliptic, are defined by the changing of Earth's seasons. The approximate dates the Sun is in the Tropical sign of Cancer is from approximately June 21 -July 22.
The Sidereal Zodiac and Cancer
The sidereal (star) zodiac begins its yearly cycle when the Sun aligns with the constellation of Aries in the sky. Then, like the tropical zodiac, divides the ecliptic into 12 equal sections of 30 degrees each. The approximate dates the Sun is in the Sidereal sign Cancer is July 16 - August 16.
Precession of the Equinoxes
The astrological signs and the constellations lined up in ancient times, but due to the precession of the equinoxes, each astrological sign now largely overlays the star constellation that once preceded it. All of the Cancer Constellation is now the backdrop of the astrological sign of Leo.
Cancer Constellation's Notable Stars
When the planets and or an important point aspect one of constellation Cancer's stars in a natal chart, that star's influence is thought to be particularly strong. An aspect by a conjunction from these stars to planets and points the birth chart are very significant. All of constellation Cancer's stars are currently in the astrological sign of Leo.
- Praesepe is a large cluster of stars often called the Beehive Cluster.
- Asellus Borealis, a white-hued star is called the Northern Donkey.
- Asellus Australis, a giant orange-hued star is called the Southern Donkey.
- Acubens, which means "the claw," is a double star and the main star of Cancer.
More About Praesepe, the Beehive
Praesepe, from the Greek Phatne, means manger or crib. Interestingly, every Christmas sky features the Northern Cross, standing upright on the western horizon just about to set and directly opposite on the eastern horizon Praesepe, the "Manger," is rising.
Praesepe in a Birth Chart and by Transit
The aspects Praesepe makes in a birth chart and by transit say something about the emergence from the family nest, finding new paths and directions, or leaving behind old dwellings and what they represent. It can impel emergence, migration, new beginnings, shedding old skins, skeletons, and cocoons. Praesepe is currently at 7-8° Leo.
- Pablo Picasso has Praesepe conjunct his Ascendant.
- Arnold Schwarzenegger has Paresepe conjunct his Sun.
- Frida Kahlo has Praesepe has conjunct her Mercury.
Astrological Cancer's Symbol or Glyph
Some say the Cancer symbol or glyph represents a woman's breasts and shows the nurturing qualities of the sign. However, it's also believed that the symbol for the sign of Cancer is a representation Asellus Borealis and Asellus Australis, the two Asses (donkeys) that took part in the conflict of the gods with the giants on the peninsula of the Macedonian Pallene (the early Phlegra,) who were afterwards rewarded by being given a resting-place in the sky on either side of the Manger." Some consider that this might be the origin of the positioning of a donkey always behind the manger, as is seen in nativity pictures of the birth of Christ.
Cancer the Disease
- The tumor reminded him of the hard shell of a crab.
- The veins and tributaries of malignancy around the tumor looked like to legs of a crab.
- The disease, like the sharp pinch of crabs claws, is tenacious and never loosens its grip on an individual.
After Hippocrates' applied the name kávouras to cancerous cells, it was another 350 years before Celsus, a Greco-Roman philosopher, wrote a very important encyclopedia of medicine and used the Latin equivalent and named the disease cancer. That name remains to this day
Essential to Astrology
Although the constellations and the signs are not the same, the zodiacal constellations and their stars are important to astrology. The myths and history of the constellations that touch the Earth's ecliptic helped ancient astrologer/astronomers define astrology's twelve signs.
The Myth Behind Constellation Cancer
According to ancient Greek legend, the Cancer constellation represents the giant crab that bit the heel of Hercules during the second of the 12 labors he performed as penance for killing his family. It was sent by the jealous goddess, Hera, to thwart Hercules as he battled the water serpent Hydra. Hercules killed the crab with his club, and the crab was then placed among the stars in gratitude by Juno, the enemy of Hercules.
The History Behind Constellation Cancer
Richard Allen in his book Star Names: Their lore and Meaning says of the Cancer constellation that it was the "Dark Sign, that was described as black without eyes," and that "few heavenly signs were subjects of more attention in early days, and few better determined"
- According to Chaldaean and Platonist philosophy, the Cancer constellation was the supposed "Gate of Men" through which souls descended from heaven into human bodies.
- In Egyptian records, it is described as a sacred Scarabaeus, a symbol of regeneration, transformation, and re-birth; of being self-created, or self-made.
- The Kabbalists associated Cancer the Hebrew letter Tzaddi and the 18th Tarot Trump "The Moon."
- There was also an ancient belief that the Moon was located in constellation Cancer at creation.
Astrologically Cancer is the fourth sign of the zodiac and the Cardinal Water sign. Cancer is ruled by the Moon. The Cancer archetype includes anything about mothers, childhood, and the search for roots and belonging. A few of astrological keywords for Cancer are nesting instinct, mother, home-loving, protective, sensitive, and nurturing, as well as smothering and hard-shelled.