: The internal structure of stars, nuclear fusion reactions, and the life cycles of stars—from formation to remnants like white dwarfs, neutron stars, and black holes.
: The study of the universe's origin (the Big Bang), expansion, dark matter, and dark energy. Recommended Resources Introductory Astronomy and Astrophysics
: Morphology and dynamics of the Milky Way, other galaxies, and active galactic nuclei (quasars). : The internal structure of stars, nuclear fusion
: Formation and dynamics of planets, moons, asteroids, and the Sun. : The internal structure of stars
: Spherical astronomy, celestial mechanics (gravity and motion), and astronomical instruments like telescopes and spectrographs.