Here are two simple ways to say that idea for a 7-year-old:
Rephrase 1: Stars are really far away from each other, but from Earth they can look like they line up, and long ago people drew pictures by joining those stars called constellations.
Rephrase 2: Even though stars sit very far apart, they sometimes seem to make straight lines or shapes, and people long ago connected them to make pictures we call constellations.
Quick step-by-step explanation:
- Stars live very far away in space.
- From Earth, those distant stars can look close together or lined up.
- Long ago, people imagined lines between the stars to make pictures — those pictures are called constellations.