National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Small Worlds, Big Discoveries Banner
News & Events
On the Path to Pluto, 5 AU and Closing
25 Oct 2013
(Source: NASA/APL)

New Horizons Sognpost/Highway Signpost stating that Pluto is 5 AUs away from the New Horizons spacecraft.
Did you know? An astronomical unit (AU) is the average distance between the Earth and sun, about 93 million miles or 149 million kilometers. New Horizons' journey from Earth to Pluto will cover more than 32 AU.

Pluto isn't quite the next exit on New Horizons' voyage through the outer solar system, but the destination is definitely getting closer. Today the NASA spacecraft speeds to within five astronomical units (AU) of Pluto - which is less than five times the distance between the Earth and the sun, or about 460 million miles.

"It's exciting to be closing in on the Pluto system," says Alan Stern, New Horizons principal investigator from Southwest Research Institute, Boulder, Colo. "The encounter begins in January 2015 - just over 14 months from now. You can really feel the energy level rising on this mission!"

Since launch in January 2006, New Horizons has covered more than 2.7 billion miles (4.4 billion kilometers) - about 85 percent of its journey - putting it in an exclusive club of deep-space explorers that includes NASA's Pioneer 10, Pioneer 11, Voyager 1 and Voyager 2. In fact, the next milepost on New Horizons' path comes next summer, when it crosses the orbit of Neptune on Aug. 25 - exactly 25 years after Voyager 2 made its historic exploration of that giant planet. When New Horizons arrives at Pluto on July 14, 2015, it will have traveled farther than any spacecraft ever has to reconnoiter its prime target.


Related Links:


Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writer: Autumn Burdick
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> USA.gov
> ExpectMore.gov
> NASA Advisory Council
> Open Government at NASA