Extra-terrestrial

Some scientists believe that our first contact with extra-terrestrial life will occur in the next decade or so.

Source: tatoeba (4672751)

Although others had floated the idea of orbital telescopes, Spitzer’s 1946 paper entitled “Astronomical advantages of an extra-terrestrial observatory” described in detail the scientific advantages of placing a telescope in space.

Source: tatoeba (8713622)

I read the research paper "Sea ice, extremophiles and life on extra-terrestrial ocean worlds."

Source: tatoeba (10671601)