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Are we alone?

Fermi Paradox

There is an estimated 200-400 billion stars (2-4 x 10¹¹) in our Milky way galaxy only and as Hubble reveals there is all in all 100 billions galaxies in the visible universe and this number is likely to increase to 200 billion as the telescope technology in space improves NASA Is Sending a Life-Looking Drone to Saturn’s Enormous Moon Titan.

In November 2013, astronomers reported based on kepler mission data that there could be as many as 40 billion earth like habitable exoplanets revolving around stars and red dwarfs in milky way galaxy alone. Out of which 11 billion may be orbiting around the sun like star. Keeping these facts in mind the possibility of potential habitable Exoplanets is pretty good.