Why does the constellation Cancer bear exactly this name and how is it related to the point of the summer solstice

Why does the constellation Cancer bear exactly this name and how is it related to the point of the summer solstice, which has the sign of the constellation Cancer? In which constellation is the summer solstice point currently located (indicated by the sign of the constellation Cancer)? When can you see the constellation Cancer well – in winter or summer?

2 thousand years ago, the signs of the zodiac coincided with the zodiac constellations of the same name. The reason for the displacement of the signs of the zodiac and the zodiac constellations of the same name is the precession, or the anticipation of the equinoxes, established by Hipparchus of Rhodes in the II century BC. In that distant era, at the time of Hipparchus, the vernal equinox was in the constellation Aries, therefore it was designated by the sign of this constellation, the sign of Aries. Similarly, the point of the summer solstice was in the constellation of Cancer and is indicated by its sign (after all, the Sun first becomes higher and higher every day in the spring, and in the summer, after the summer solstice, lower and lower, and the sign of Cancer, as it were, personified the beginning of a backward movement).