"Extraterrestrial life or alien life is life which does not originate from Earth."
Search for extraterrestrial life and the possibility of life beyond earth.
Biology: Understanding the foundational concepts of life and its evolution on Earth.
Chemistry: The study of chemical reactions that occur in living organisms and their interplay with the environment.
Geology: The study of the physical properties and processes of solid earth, including plate tectonics and the evolution of the Earth's crust.
Planetary science: The study of the formation, composition, and dynamics of planets, including the conditions required for habitation.
Physics: The study of the laws of nature, including the forces that govern the movements and interactions of matter and energy.
Astrochemistry: The study of chemical processes in outer space, including the formation of organic molecules and their distribution in the universe.
Extrasolar planets: The study of planets outside our solar system, including their formation, properties, and potential for life.
Exobiology: The study of life beyond Earth, including the search for evidence of extraterrestrial microorganisms and intelligent life forms.
Biogeophysics: The study of the interactions between living organisms and the physical environment, including their adaptation to extreme conditions.
Astroecology: The study of the ecosystems and biotic components of celestial bodies, including their microbial ecology and the potential for panspermia.
Origin of life: The study of the chemical and physical processes that led to the emergence of life on Earth, including the role of atmospheric composition and the contribution of comets and meteorites.
Habitable zones: The study of regions around stars where the conditions may be suitable for the existence of liquid water and potentially habitable worlds.
SETI: The Search for Extraterrestrial Intelligence, including the use of radio telescopes and astronomical observations to detect potential signals from other life forms in the universe.
Ethics and societal impact: The study of the ethical and societal implications of discovering life beyond Earth, including the impact on culture, religion, and philosophy, as well as the potential implications for space exploration and colonization.
Astrobiology missions and methods: Study about both planned and completed missions and the different methods used to study astrobiology.
Exoplanet Astrobiology: The study of the conditions and possibility of life on planets outside our solar system.
Planetary Astrobiology: The study of the conditions and possibility of life on planets in our solar system.
Origin of Life Astrobiology: The study of the origin and evolution of life, including the chemical and physical processes that led to its emergence.
Astrochemistry: The study of chemical processes that occur in space, including the formation of complex organic molecules that may be related to the origin of life.
Astroecology: The study of the interactions between living organisms and their environment in space.
Search for Extraterrestrial Intelligence (SETI): The study of signals and messages that may originate from other civilizations in the universe.
Astrobiogeology: The study of the geology and geography of other planets, including the role of water, volcanic activity, and other geological factors in the possibility of life.
Experimental Astrobiology: The study of biological systems and processes under simulated extraterrestrial conditions.
Space Biology: The study of the effects of space travel on living organisms, including astronauts and biological samples sent into space.
Astroethics: The study of ethical issues related to the search for and potential discovery of extraterrestrial life.
"No extraterrestrial life has yet been conclusively detected."
"Such life might range from simple forms such as prokaryotes to intelligent beings."
"The Drake equation speculates about the existence of sapient life elsewhere in the universe."
"The science of extraterrestrial life is known as astrobiology."
"Speculation about the possibility of inhabited worlds beyond Earth dates back to antiquity."
"Early Christian writers discussed the idea of a 'plurality of worlds' as proposed by earlier thinkers."
"Lucretius predicted that humanity would find innumerable exoplanets with life-forms similar to, and different from, the ones on Earth, and even other races of man."
"William Vorilong acknowledged the possibility that Jesus could have visited extraterrestrial worlds to redeem their inhabitants."
"He theorized all extraterrestrial bodies could be inhabited by men, plants, and animals, including the Sun."
"Descartes wrote that there was no means to prove that the stars were not inhabited by 'intelligent creatures.'"
"Since the mid-20th century, active research has taken place to look for signs of extraterrestrial life."
"Methods range from the analysis of telescope and specimen data to radios used to detect and transmit communications."
"The concept of extraterrestrial life, and particularly extraterrestrial intelligence, has had a major cultural impact, especially extraterrestrials in fiction."
"Science fiction has communicated scientific ideas, imagined a wide range of possibilities, and influenced public interest in and perspectives on extraterrestrial life."
"One shared space is the debate over the wisdom of attempting communication with extraterrestrial intelligence."
"Some encourage aggressive methods to try to contact intelligent extraterrestrial life."
"Others – citing the tendency of technologically advanced human societies to enslave or destroy less advanced societies – argue it may be dangerous to actively draw attention to Earth."
"Encompassing searches for current and historic extraterrestrial life."
"A narrower search for extraterrestrial intelligent life."