Canes Venatici is a group of stars in the sky that looks like two dogs, one small and one big, chasing after a bear. It's like a big game of pretend that we play, where we see pictures in the stars instead of just dots. In some stories, the small dog is named Chara and the big dog is named Asterion, and they are chasing the bear named Ursa Major.
This group of stars was first discovered by an astronomer named Johannes Hevelius in the 17th century. He thought the stars looked like two greyhound dogs, which is why the group is called Canes Venatici, which means "hunting dogs" in Latin.
Scientists use Canes Venatici to study the stars and galaxies in the universe. They can look at how the stars move and interact with each other, and they can also use telescopes to look at galaxies that are far away. By studying Canes Venatici, scientists are trying to learn more about how the universe works and how it began.