TY - BOOK AU - Harwit, M TI - Astrophysical concepts T2 - Astronomy and Astrophysics Library SN - 0-387-94943-7 PY - 1998/// CY - New York PB - Springer-Verlag KW - Astronomical Bodies KW - Astrophysics KW - Cosmic Dust KW - Planetary Systems KW - Universe ER -