From the May 2010 issue

Exploring the solar system’s frigid edge

The faint, distant objects of the Kuiper Belt hide secrets as to how the solar system formed.
By | Published: May 24, 2010 | Last updated on May 18, 2023
New Horizons path to Pluto
New Horizons’ path to Pluto.
Astronomy: Kellie Jaeger

The New Horizons spacecraft is making a beeline toward distant Pluto. In 2010, it passes the halfway point to its prime destination — twice, in fact. On February 25, it reached the midpoint in distance traveled; on October 16, it will have been in space for half the time it will take to get to Pluto.