A small group of stars is a cluster or a constellation of stars.
There are plenty of small groups, with the most popular and well known being the All Star Cheerleaders.
Does elks live alone or in small groups or large groups
There are constellations, groups of stars or star clusters that look like an animal/person/thing.
star fishes live in alone and in groups
In different groups
No, we see the sun as a small star.
small groups = kvutsot ktanot (קבוצות קטנות)
small groups of people.
Small groups
The difference between the death of a small star and a massive star is what the become afterwards. A small star will typically become a red dwarf while a large star will become a neutron star or a black hole.
star cluster
In different groups