1. Centre for Astrophysics Research, Department of Physics, Astronomy and Mathematics, University of Hertfordshire , Hatfield AL10 9AB, UK
2. Department of Astrophysics, American Museum of Natural History , New York, NY 10024, USA
3. Department of Chemistry, Dordt University , Sioux Center, IA 51250, USA
4. Space Science Institute , Boulder, CO 80301, USA
5. Department of Planetary Sciences and Lunar and Planetary Laboratory, University of Arizona , Tucson, AZ 85721, USA
6. Department of Astronomy and Carl Sagan Institute, Cornell University , 122 Sciences Drive, Ithaca, NY 14853, USA
7. The Graduate Center, City University of New York , New York, NY 10016, USA
8. NASA Ames Research Center , Mail Stop 245-3, Moffett Field, CA 94035, USA
9. Bay Area Environmental Research Institute , 625 2nd Street, Suite 209, Petaluma, CA 94952, USA
10. SETI Institute , Mountain View, CA 94043, USA