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Theory:

Universe:
The Universe consists of a cluster of galaxies, stars, planets, satellites, and many other celestial bodies.
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Universe
 
Galaxy:
A galaxy is a large collection of stars and celestial bodies held together by the force of gravitational attraction between them.
Milky Way:
The galaxy that we live in is the Milky Way Galaxy, which is spiral in shape. From Earth, the Milky Way appears like a band of light in the night sky, hence got the description “milky”. In Indian mythology, the Milky Way is also known as 'Akashganga'.
 
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Milky Way Galaxy
 
Our nearest galaxy is the Andromeda galaxy which is at a distance of \(2.5\) million light years away.
 
Solar system:
The word 'Solar system' is derived from the Latin word 'Sol', meaning 'Sun'. The system of the Sun and the planets revolving around it form the solar system.
The solar system comprises the Sun at the centre and the celestial bodies such as planets, comets, asteroids, and meteors that revolve around it in a fixed orbit. The celestial objects revolve around the Sun due to the force of gravitational attraction between them.
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Solar system
Reference:
https://www.freepik.com/free-vector/solar-system-galaxy_9736153.htm#page=1&query=solar%20system&position=0