Respuesta :
Answer: Galaxy
Explanation:
A galaxy is a large group of stars. It contains billions of stars, their planetary system, star clusters, nebula and interstellar material made of dust and gases etc.
Nebula is stellar nursery where stars are born. It is composed of dust and gases.
Planets are found in a star system like solar system has 8 planets. Solar system is present in Milky way galaxy.