Extraterrestrial life

life that does not originate from Earth

NASA space probe launched in March 1972

zone around the star with strong possibilities for stable liquid water and evolution of life

Proposed scale by which the scope of a civilisation might be measured

plaque attached to the Pioneer 10 and Pioneer 11 spacecraft in case extraterrestrial life finds them

theory regarding lack of alien contact

whatever prevents non-living matter from undergoing abiogenesis and later becoming spacefaring.

intelligent extraterrestrial beings

stock character; little humanoid extraterrestrials with green skin and often antennae on their heads

theory that characterizes object complexity

science fiction genre focused on biology

proposed SETI measurement

idea that says unidentified flying objects (UFOs) and related events involve visitations from other "realities" or "dimensions" that coexist separately alongside our own

The term "exotheology" was coined in the 1960s or early 1970s for the examination of theological issues as they pertain to extraterrestrial intelligence. It is primarily concerned with either conjecture about possible theological beliefs that extraterrestrials might have, or how our own theologies would be influenced by evidence of and/or interaction with extraterrestrials.

Mars life detection experiments

changes resulting from contact with an extraterrestrial civilization

hypothesized solution to the Fermi paradox that alien civilizations are storing energy and hibernating till the universe cools to make better use of stored energy to do tasks

solution to the Fermi paradox by holding that our astronomical observations represent an illusion

overview about the communication with extraterrestrial intelligence

idea that humanity is the first intelligent life