Production of Interstellar Molecules and Amorphous Semiconductors by Atom Tunneling Reaction

摘要: The Big Bang, a titanic explosion, took place some 12 billion years ago, spawning the enormity of universe from single point in space-time. Figure 9.1 shows evolution universe. Dense interstellar clouds are birth places stars all masses and their planetary systems. Interstellar molecules dust become building blocks for protostellar disks, which planets, comets, asteroids, other macroscopic bodies eventually form (Ehrenfreund Charnley 2000a). It has been recognized that is ubiquitous Galaxy. presence most obvious dark clouds, absorbs scatters light background so revealed by apparent absence such stars. 9.2 displays well-known horsehead nebula, part much larger cloud. Starlight illuminates nebula’s background, causing hydrogen there to fluoresce. Thus, “head” silhouetted. Open image new window Fig. 9.1 Evolution universe Open 9.2 The nebula