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That is a big question we all have: are we alone in the universe? And exoplanets confirm the suspicion that planets are not rare.

Neil deGrasse Tyson
Bigs, Planets, Suspicion
"Why Revive ‘Cosmos?’ Neil DeGrasse Tyson Says Just About Everything We Know Has Changed". Interview With David Freeman, www.huffingtonpost.com. March 4, 2014.
That is a big question we all have: are we alone in the universe? And exoplanets confirm the suspicion that planets are not rare.