Cosmogony studies the origin of the universe, and cosmography maps the features of the universe.
In Diderot's Encyclopédie, cosmology is broken down into uranology (the science of the heavens), aerology (the science of the air), geology (the science of the continents), and hydrology (the science of waters)..
In summary, cosmology is considered difficult for undergraduates because it involves complex mathematical models, abstract and theoretical concepts, an interdisciplinary nature, lack of experimental data, high-level mathematics, and a theoretical nature..
Courses in cosmology, relativity and gravity analyze the work of Albert Einstein, Isaac Newton, Edwin Hubble and other prominent physics scholars
These are the best physics schools for cosmology / relativity / gravity
Princeton UniversityCalifornia Institute of Technology
Massachusetts Institute of Technology