Difference between Astronomy and Cosmology

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Cosmology focuses on the large-scale structure and evolution of the universe, examining fundamental questions about its origin, expansion, and ultimate fate. In contrast, astronomy and astrophysics concentrate on individual celestial objects and structures, such as dust, planets, stars, galaxies, and clusters of galaxies. While there is some overlap in observational methods between cosmology and astronomy, the two fields are distinct in their scope and objectives.
Salman Ranjha
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What Is the difference between Cosmology and Astronomy..?
 
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Cosmology concerns itself with large scale structure of the universe and its evolution.
It does not deal with dust, planets, stars, galaxies and clusters of galaxies, nor any other individual objects and structures - these fall under the scope of astronomy and astrophysics.

There's some overlap, though, for example with observation methods.
 

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