Physics- Astrophysics–

Stellar Structure and Evolution- Protostars, Main Sequence Stars, Red Giants, Supergiants, White Dwarfs, Neutron Stars, Black Holes.

Galactic Dynamics and Structure- Rotation Curves, Galactic Bulge, Spiral Arms, Galactic Disks, Stellar Populations, Galactic Nuclei, Galactic Halo, Interactions and Mergers, Dwarf Galaxies, Dark Matter.

Cosmology- Physical Cosmology, Observational Cosmology, Theoretical Cosmology, Philosophical Cosmology, Religious Cosmology, Multiversal Cosmology, Astrobiology and Exoplanetary Cosmology.

Exoplanets and Planetary Systems- Terrestrial Planets, Gas Giants, Ice Giants, Super-Earths, Mini-Neptunes, Hot Jupiters, Exoplanets in Habitable Zones, Pulsar Planets, Binary Star Systems, Rogue Planets.

High-Energy Astrophysics- Active Galactic Nuclei (AGNs), Gamma-Ray Bursts (GRBs), Pulsars and Neutron Stars, Supernova Remnants (SNRs), Cosmic Rays, Black Holes, High-Energy Transients, Cosmic Microwave Background (CMB).

Astrophysical Instrumentation and Observational Techniques- Telescopes, Detectors, Spectrographs, Interferometers, Imaging Systems, Space-based Observations, Observational Techniques.

Astrophysical Fluid Dynamics and Plasma Physics- Stellar Structure and Evolution, Solar Physics, Galactic Dynamics, Interstellar Medium (ISM), Cosmic Plasma Physics, Magnetohydrodynamics (MHD), Astrophysical Jets and Outflows, Cosmic Ray Physics, Hydrodynamic and Magnetohydrodynamic Simulations.

Astrobiology- Exobiology, Astrochemistry, Planetary Science, Astrophysics and Cosmology, Biosignature Detection, Exoplanet Research, Origin of Life Studies, Extreme Environment Studies.