Step 1: Identify New Horizons.
“New Horizons” is a NASA space probe launched in 2006 under the New Frontiers program.
It was designed to perform a flyby study of Pluto, its moons, and later objects in the Kuiper Belt.
Step 2: Why it was in the news in 2015.
On July 14, 2015, New Horizons successfully made its closest approach to Pluto, sending back the first detailed images and scientific data of the dwarf planet and its system. This was a historic moment, as it marked humanity’s first close encounter with Pluto.
Step 3: Eliminate wrong options.
(A) Not a book, (B) Not a company, (D) Not a magazine, (E) Not a film.
Thus, the correct reference is:
\[
\boxed{\text{Mission to Pluto}}
\]