Credit: NASA and The Hubble Heritage Team (STScI/AURA),Cosmic Voyage 宇宙之旅,Credit: Addison Wesley,黃道面,Credit: NASA/JPL-Caltech/R. Hurt (SSC),The Milky Way Galaxy 銀河系,100 000 light years,400 billion stars,Spiral arms 旋臂,Credit: Addison Wesley,Atom 原子,Electron 電子,Proton 質子 Neutron 中子,Atomic Nucleus 原子核,Credit: Addison Wesley,Credit: Astronomy,Local Group 本星系群,Credit: 2MASS, Infrared Processing and Analysis Center, Caltech, University of Massachusetts,Virgo Supercluster 室女座超星系團,
