Dictionary > Extraterrestrial

Extraterrestrial

Definition
adjective
(astronomy) Of, pertaining to, relating to, or occurring beyond the earth’s atmosphere
noun
(astrobiology) The hypothetical form of life outside the earth’s atmosphere
Supplement
Extraterrestrial is a term used to denote to entities (palpable or hypothetical) occurring outside the earth or its atmosphere. The term is derived from the combination of the terms, extra, which means beyond, and terrestrial, which pertains to (the land of) earth. Thus, the term, extraterrestrial life, pertains to a living thing existing outside the earth, from space, or from another planet. The concept of extraterrestrial life, though, remains hypothetical since there are no data reported to support the notion of life beyond earth. Astrobiologists and astronomers, though, remain vigilant in finding proofs that there is. Extraterrestrial physics is a field in physics that works on astrophysics and space plasma research, such as that in Max Planck Institute for Extraterrestrial Physics. Their research is focused on the physics of space, particularly outside the earth’s atmosphere using balloons, airplanes, rockets, satellites, and space craft.1
Word origin: Latin extra (outside, except, beyond), from exter (being on the outside) + Latin terrestri (s) pertaining to earth, from terra (earth) + -al
Abbreviation / Acronym: ET
See also:

Related term(s):

  • Extraterrestrial Being
  • extraterrestrial life
  • extraterrestrial intelligence
  • Reference(s):

    1Max Planck Institute for Extraterrestrial Physics. URL: https://www.mpe.mpg.de/2617/institute


    You will also like...

    Still freshwater and plants
    Still Freshwater & Plants

    Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..

    Freshwater Ecology
    Freshwater Ecology

    Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

    Homeostatic Mechanisms and Cellular Communication
    Homeostatic Mechanisms and Cellular Communication

    Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..

    Lights' Effect on Growth
    Lights’ Effect on Growth

    This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

    Digestion and Absorption of Food
    Digestion and Absorption of Food

    The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..

    Young plant growing from the soil.
    Soils

    Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..