New Horizons

New Horizons is a space probe launched on 19 January 2006, that has done fly-by explorations of Pluto in 2015, and Ultima Thule in 2019.

Quotes

 * Well, this mission's always been about delayed gratification. It took us 12 years to sell it, it took us 5 years to build it, it took us 9 years just to get to the first target. So 'course you are gonna have to wait just a little bit.
 * Alan Stern, principal investigator, in Press Conference of New Horizons after Ultima Thule fly-by (1 January 2019) [42:02-42:17]