📆 1950 the question "Where is everybody ?" occurred to #Fermi at lunch 🍽️ one day.

• The #MilkyWay 🌌 contains hundreds of billions of stars 🎇, and billions of them are similar to the #sun ☀️.
• It is highly likely that some of these stars will have planets 🪐 that are similar to #Earth 🌏.
• If we assume – via the #Copernican principle – that Earth is not particularly special, then #intelligent life should also exist on some fraction of these Earth-like #planets.
• Some of these intelligent life-forms might develop advanced technology, and even #InterstellarTravel.
• #Interstellar travel would take a long time, but as there are many sun-like #stars that are billions of years older, there has been plenty of time ⌛ for such #travel to have occurred.
• Given all this, why haven’t we met or seen 🔭 any trace of #aliens 👽 ?
https://cosmosmagazine.com/space/exploration/what-is-the-fermi-paradox/

#FermiParadox

Picture : https://commons.wikimedia.org/wiki/File:Enrico_Fermi_and_Bruno_Pontecorvo_1950s.jpg

#19febbraio 1473, nasce l'astronomo polacco Niccolò Copernico. Noto per aver promosso l'evidenza del sistema eliocentrico contro il sistema geocentrico fino ad allora sostenuto in Europa.
#Astronomy #History
#sole #Terra #astronomia
#Copernican revolution
@museogalileo