Another definition of unique is "particularly remarkable, special, or unusual" [1]. Makes sense with how the original quote also said "We have 36 more flybys t

Another definition of unique is "particularly remarkable, special, or unusual" [1]. Makes sense with how the original quote also said "We have 36 more flybys to study just how unique it really is." www.merriam-webster.com has one definition which says it's a synonym of "unusual" [2]. [1] https://www.google.com/#q=unique https://www.google.com/#q=unique (in the top info box) [2] http://www.merriam-webster.com/dictionary/unique http://www.merriam-webster.com/dictionary/unique (#3 in the full definition, all-caps meaning that it's a synonym for the word in caps)