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Do aliens exist? Show more Show less

It's a question humanity has pondered for centuries. People have throughout time reported seeing mysterious objects flying in the sky, sightings of little green men, and even being abducted. But is this just the stuff of imagination? Does life exist in outer space? Or are we really all alone?

Probably yes, but we don’t yet have proof of life beyond Earth Show more Show less

People taking this view consider that in a Universe where there are enormous numbers of worlds like ours it is likely that life has arisen many times. But until we have evidence we don’t know for sure
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Several exoplanets have been discovered that may harbour life

The so-called exoplanets are planet found outside our Solar System. Some might be candidate for a life
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The advance in space exploration with telescopes or other instruments either on Earth or in Space allowed the detection of several planets on many Stars.

The Argument

The analysis in the latest years allow to detect planets on outer Solar Systems. The analysis could predict the planets composition (spectrography), whether it is a gas giant (such as Jupiter and Saturn) or a rocky planet; and its orbit around the sun, i.e. if the orbits is inside what is called "Goldilocks" zone where water on liquid state can exist.

Counter arguments

The analysis conducted so far only proves that some planets might be compatible with life but does not say anything with respect of actual presence of a life-form or which is its state (whether primordial or intelligent).



Rejecting the premises


Further Reading

Nasa site on exoplanets exploration:


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    This page was last edited on Friday, 17 Apr 2020 at 11:52 UTC