These are exciting times for exobiology. The ubiquity of organic
molecules in interstellar clouds, comets and asteroids strongly supports
a cosmic perspective on the origin of life. Data from both ground-based
telescopes and the recently launched Infrared Space Observatory are
providing new insight into the complexity of carbon-based chemistry
beyond the Earth. Meteorites give us solid evidence for extraterrestrial
amino acids, and putative fossil evidence for life in a 3.6
billion-year-old Martian meteorite hints that life in our system might
not be the sole prerogative of the Earth. Giant planets have now been
discovered orbiting other stars, and although such planets seem unlikely
to be habitable themselves, their existence strongly suggests what many
astronomers have long believed - that planetary systems are
commonplace.
All these topics are reviewed in this volume by active researchers. The
level is appropriate for graduate students in astronomy, biology,
chemistry, earth sciences, physics, and related disciplines. It will
also provide a valuable source of reference for active researchers in
these fields.