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The "heart," also known as the Tombaugh Regio, captured the public's attention immediately upon its discovery.

Being the first-ever space probe to visit the dwarf planet, New Horizons provided stunning pictures of Pluto's red and white surface, including Tombaugh Regio, a light-colored topographical swath in the shape of a heart.

Other lots relate to American aviation pioneer Amelia Earhart, who vanished while attempting a round-the-world flight in 1937, including photographs and letters, as well a telescope belonging to the astronomer Clyde Tombaugh who discovered Pluto.

Pluto had held this distinction of planet for 76 years, starting with its discovery in 1930 by American astronomer Clyde W. Tombaugh.

And finding an accompanying genetic record of the senders on board, with more information content than Tombaugh’s ashes, would be even more exciting.