Linda Billings

While the scientific discourse on astrobiology—the study of the origin, evolution, and distribution of life in the universe—leans toward optimism about the possibility of extraterrestrial life, optimistic thinking is tempered by the limits of evidence and observations gathered thus far. Most astrobiologists assume that “first contact” with extraterrestrial life, if it is ever to occur, will likely be the discovery of microbial life elsewhere in our solar system. But in popular culture, “first contact” tends to be characterized as contact with extraterrestrial intelligence. This article will touch on theory and research relating to the origins and evolution of life and intelligence on Earth and speculation about extraterrestrial life and intelligence.

The U.S. civilian space program is focused on planning for a new round of human missions to the Moon and, later, perhaps, to Mars. These plans are intended to realize a “vision” for exploration articulated by President George W. Bush. It is important to examine this “vision” in the broader context of 21st-century space exploration, which is a truly global enterprise. Questions to be addressed include the following: How will extending human presence into the solar system affect society and culture on Earth? What legal, ethical, and other value systems should govern human settlements and other activities in space? Do humans have rights to exploit extraterrestrial resources and alter extraterrestrial environments? Does space exploration need reinvention to meet social needs? This article describes the current environment for space policy making and a framework of space law, ethics, and culture within which these questions can be considered.