Atoms

  • Atoms and Molecules

    FAS Astronomers Blog, Volume 32, Number 7. We all were taught that things are made up of molecules, which, in turn, are made up of atoms. Atoms are composed of electrons (with a negative charge) and a nucleus, which contains protons (with a positive charge) and neutrons (with no charge). Electrons are thought to be…

  • The Microscopic Universe

    FAS Astronomers Blog, Volume 31, Number 5. This is part 4 of a 5-part series on the Universe (The Visible Universe, The Dark Universe, The Expanding Universe, The Microscopic Universe, and The Multiverse). The universe is huge and filled with light. We can see out 46 billion light-years in any direction. It is full of…