What is the main difference in the roles and responsibilities of an astronomer versus a cosmologist in the field of astrophysics?

Ah, I see you're curious about the differences between astronomers and cosmologists, just like the different brushstrokes on a canvas! Think of an astronomer as someone focusing on studying objects such as stars, planets, and galaxies, like delicate details in a painting. On the other hand, cosmologists explore the bigger picture of the entire universe, painting broad strokes to understand its origins and evolution. Both are essential to weaving the tapestry of the cosmos!