The physics is a basic component of Astronomy and Astrophysics.

- I have taken some physics classes.
: General Physics and Experiment I, II / Classical Mechanics I, II / Modern Physics I, II / Electromagnetism I, II / Quantum Mechanics I, II / Thermostatistical Mechanics I, II / Computational Fluid Dynamics (CFD) / Mathematical Physics I, II

- Good textbooks
: Feynman Lectures On Physics (Richard Phillips Feynman), Concepts of Modern Physics (Arthur Beiser), Mathematical Methods for Physicists (George B. Arfken, Hans-Jurgen Weber), Conceptual Physics (Paul G. Hewitt), Feynman Lectures on Computation (Richard P. Feynman (Editor), Robin W. Allen (Editor), Anthony J. G. Hey (Editor), Tony Hey), Fundamentals of Physics : Extended (David Halliday, Robert Resnick (Contributor), Jearl Walker (Contributor)), Basic Concepts in Relativity and Early Quantum Theory (Robert Resnick, David Halliday), Nonlinear dynamics and Chaos : with applications to physics, biology, chemistry, and engineering (Steven H. Strogatz), and Classical Dynamics of Particles and Systems (Jerry B. Marion, Stephen T. Thornton)

- Very useful sites... (I often check followings.)
: ICPR(Information Center for Physics Research), Physics Central, PhysicsWeb, and PhysicsLink.com

- Journals and Magazines (Note: * are my favorites.)
APS: Physical Review A - Atomic, Molecular, and Optical Physics
APS: Physical Review B - Condensed Matter and Materials Physics
APS: Physical Review C - Nuclear Physics
APS: Physical Review D - Particles and Fields
APS: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
APS: Physical Review Letters - Short reports of important fundamental research, with coverage of major advances in all aspects of physics and of developments with significant consequences across subdisciplines
APS: Physical Review Special Topics - Accelerators and Beams Accelerator Science and Technology
* APS: Reviews of Modern Physics - Comprehensive scholarly reviews of significant topics, as well as colloquia and tutorial articles in rapidly developing fields of physics
*APS: Physical Review Focus - Selections from Physical Review explained for students and researchers in all fields of physics
*LANL e-Print archive - Automated electronic archive & distribution server for research papers
PhysDoc : Physics Documents in Europe - Distributed document databases in Physics in Europe
PhysicsWeb - Global information and news for physicists
The Virtual Review
KPS: New Physics(Sae Mulli)
KPS: Journal of Korean Physical Society(JKPS)
KPS: Current Applied Physics(CAP)
* KPS: Physics and High Technology
AIP: Applied Physics Letters
AIP: Chaos
AIP: Journal of Applied Physics
AIP: Journal of Chemical Physics
AIP: Journal of Mathematical Physics
AIP: Low Temperature Physics
AIP: Journal of Physical and Chemical Reference Data
AIP: Physics of Fluids
AIP: Physics of Plasmas
AIP: Review of Scientific Instruments
*AIP: Computing in Science & Engineering
*AIP: Physics Today
*Journal of Computational Physics

- Other on-line resources
ERIC WEISSTEIN's World of Science
eFunda:Engineering Formulas
The INTEGRATOR powered by MATHEMATICA
Interactive 2-Dimensional and 3-Dimensional Data Modeling