SEARCHING FOR ANOTHER EARTH: THE RECENT HISTORY OF THE DISCOVERY OF EXOPLANETS

The discovery of exoplanets is a small part of the array of scientific arguments for and against the existence of extraterrestrial intelligence. Yet the recent stunning achievement of this program of observational astronomy has had a significant effect on scientific opinion and public interest. It also raises some key theological questions. New observing techniques are leading to the discovery of extrasolar planets daily. Earth‐like planets outside of our Solar System can now be identified and in future years explored for signs of life. This article maps the history of these discoveries and highlights some of the theological issues which are important to bring into dialogue with these scientific insights.     

The “Barn Door” Argument,The Precautionary Principle,and METI as “Prayer”—an Appraisal of the Top Three Rationalizations for “Active SETI”

Proponents of Active SETI, or METI, defend their messaging-to-aliens agenda with fallacious arguments like the Barn Door Excuse, that technologically advanced extraterrestrials must have already listened to our radio leakage, (e.g. “I Love Lucy”), hence more direct beaming will not betray Earth’s location. Further, sending pinpointed, collimated messages will only lead to positive outcomes. In fact, laser-like “messages” are far more powerful at great distances than old-time television, and those concerns about potential downsides should be appraised by scientific risk-assessment. It is argued that METI is psychologically driven as a version of the ancient human practice of prayer.     

ASTROTHEOLOGY: ON EXOPLANETS,CHRISTIAN CONCERNS,AND HUMAN HOPES

Are there planets beyond our solar system? What may appear quite plausible now had only been a hypothesis until about twenty years ago. The search for exoplanets is driven by the interest in the “habitable” ones among them. Could such planets one day in the far future provide resources or even shelter for humankind? Will we find one day a habitable planet that is even inhabited? These kinds of imaginative speculations drive public interest in the subject. Imagining alien intelligent life in the universe is not at all new. When Ted Peters called for establishing the field of “astrotheology,” he was certainly thinking less of historical precedents than of something analogous to the emerging field of astrobiology. Will astrotheology result in the decentering of humanity in cosmic dimensions? One could also conclude that we are alone, at least for all practical purposes.