Cancer is the 4th sign of the 12 zodiac signs, ruled by the Moon. Mars is the Yogakaraka. The biggest enemy is Saturn.

(The basic knowledge about Cancer can be found on Google)

Notice in the photo, Cancer is in the top right corner. Below the Cancer, there are Hydra (the serpent), Canis Minor, Monoceros (the unicorn), Canis Major, and Argo Navis (the ship). You can use any app to look at the sky and find these constellations. What Cancer includes

• The 2 dogs, Canis Minor and Canis Major, indicate mistakes that Cancer often makes. One of them is that they care too much for others, including animals. Later in life, Cancer Ascendants often realise that and learn to deal with their emotion better. They change from emotion to compassion. But why a mistake? You figure that out yourself, if you want to know.
• The head of the serpent (Hydra) is in Cancer, the tail ends in Libra, also very interesting to study. I give you a hint: Lord Shiva meditates here.
• Remember Noah's Ark, the savior. Lord Rama and the Buddha are both Cancer Ascendants. They are the best examples of what a Cancer could be like, serving life and reducing suffering.
• For the majority of Cancer Rising, there’s one more interesting creature in the sky. That’s the unicorn. Symbol of pure and healing. Cancer is often a late bloomer who goes through a lot of struggles because of its emotional nature. When they rise, they shine mostly in healing professions (doctor, teacher, therapist, etc). Of course, there are engineers, businessmen, etc, but much less.

That’s the first clue for those who are interested in learning astrology. The constellation around the zodiac signs tells a lot about the main zodiac itself.