extraterrestrial adj.

Astronomy no more reveals to us extra-terrestrial moral agents, than Religion reveals to us extra-terrestrial Plans of Divine government.

Let it be shown that the stars, instead of being substantial bodies, are in fact mere clouds of the thinnest cometic vapour—let all this and more be proved, and not the slightest reason will have been shown why the heavenly bodies may not be the homes of intelligent organisms which Almighty power and wisdom might easily devise. We may therefore dismiss both treatises as in reality proving nothing. And yet the very idea that there may be races of extra-terrestrial beings suggests many and not unprofitable considerations.

I do not wish to pose as an expert on the subject of extra-terrestrial matters. I am what you might call an amateur in the affairs of the heavens.

Few extra[-] terrestrial creatures possessed the natural capacity to reproduce the sounds of human speech.

I know more about extraterrestrial life than most professional xenologists.

The Fnool reached the elevator and without hesitation pressed the button; some extra-terrestrial Fnoolian knowledge guided its hand.

Was it the aquatic horror shape? The thing with slime and teeth, the extraterrestrial life form?

Helva’s civilization was not without busy, do-good associations, exploring possible inhumanities to terrestrial as well as extraterrestrial citizens.

You may thank our extraterrestrial friend here for making up my mind for me.

They would happen to be the first extraterrestrial civilization humans would encounter.

It should cut out all Earth-related references—they would certainly number in the millions—and concentrate entirely on extraterrestrial citations.

One good approach might be some sort of ‘interstellar homesteading’ concept, whereby nations and companies can claim extraterrestrial land that they actually use.

I didn’t know you could have fire like that, black fire—it must be a phenomenon associated with certain types of extraterrestrial objects.

It seems unlikely that my best friend becoming an international superstar for being the discoverer and chief human advocate for an extraterrestrial life-form isn’t the weirdest thing that’s ever happened to me.