Cancer Constellation with Moon on the Side If getting a crab doesn't speak to you, consider this tattoo of the Cancer constellation, with the moon — the sign's ruler — on the side.

The story behind Cancer the crab zodiac sign is connected to the mythology of the superhero of Hercules. "Hercules had dealt with all kinds of monsters in his labors; he had 12 labors.

The small constellation of Canis Minor, at right, with the bright star Procyon, and Cancer the crab to the left, with the star cluster Messier 44, or the Beehive The smaller cluster M67 is below ...

Others sit there quietly, waiting for you to find them. This week, we are looking for one of the latter. Cancer is a humble constellation, nestled in between its louder neighbours Gemini and Leo.