What's the difference between astronomy and astrophysics? Are they the same

Good question. They're all closely related, especially cosmology and astrophysics. Astronomy includes study of close objects like the Moon, the rest of the Solar system and nearby stars, as well as the Universe as a whole. Cosmology is about the whole universe and how it evolved and how it will end, if ever. Astrophysics is about things like how stars are formed, burn their fuel, end up, black holes, white dwarfs, neutron stars, supernovae, cosmic rays and all these other extreme physics events, most of which we can only observe and theorise about, but not experiment with in the laboratory, because we're not clever enough. We can't make particles energetic enough and we can't control gravity. Which should you study? You'll be able to answer that question after you've studied astronomy as a freshman at uni. All 3 subjects require the same introductory course. All are interesting. Good luck. I just studied 1st year astronomy. I'm not a professional in any of the 3 fields, but I find them all interesting.
 
Astronomy is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe

Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties of celestial objects such as galaxies, stars, planets, exoplanets, and the interstellar medium, as well as their interactions. The study of cosmology is theoretical astrophysics at scales much larger than the size of particular gravitationally-bound objects in the universe.

Cosmology is study of the Universe in its totality, and by extension, humanity's place in it. Though the word cosmology is recent (first used in 1730 in Christian Wolff's Cosmologia Generalis), study of the Universe has a long history involving science, philosophy, esotericism, and religion.
 
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