National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
News & Events
NASA Goddard Managed Comet Hopper Mission Selected for Further Study
NASA Goddard Managed Comet Hopper Mission Selected for Further Study
5 Dec 2011
(Source: Goddard Space Flight Center)

Illustration of comet hopping spacecraft.
Graphic artist concept of Comet Hopper. Credit: NASA/GSFC/University of Maryland

NASA selected the Comet Hopper mission to continue in its mission concept phase. If chosen to move forward for a 2016 mission, the project would be managed by NASA Goddard Space Flight Center in Greenbelt, Md. Jessica Sunshine of the University of Maryland in College Park is the principal investigator. The team will receive $3 million for further studies.

"We've had some amazing cometary flybys but they have given us only snapshots of one point in time of what a comet is like," said Sunshine. "Comets are exciting because they are dynamic, changing throughout their orbits. With this new mission, we will start out with a comet that is in the cold, outer reaches of its orbit and watch its activity come alive as it moves closer and closer to the sun."

The Comet Hopper mission would study the evolution of 46P/Wirtanen by landing on the comet multiple times and observing its changes as it interacts with the sun. Comet Hopper would observe the comet by making detailed in situ measurements from various locations on the surface and in the innermost coma as the comet moves through its orbit. The innermost coma is the atmosphere of the comet just off the surface of the nucleus where outgassing and jets originate.

"We would extensively explore the surface of a comet, this is something that has never been done before," said Joe Nuth, Comet Hopper project scientist at NASA Goddard. "We know that there are volatiles (molecules that easily evaporate at normal temperatures) inside a comet. We would go to places that are relatively flat and are likely hiding volatiles. Comet Hopper could be called a reconnaissance mission for an upcoming Comet Nucleus Sample Return mission, which has been deemed a high priority development effort by the Decadal Survey."

The spacecraft would carry complementary instruments to study the physical and chemical structure of the comet's nucleus and innermost coma. The suite of instruments would include both remote and in situ capabilities. Other partners would include Lockheed Martin, KinetX, the Johns Hopkins University Applied Physics Laboratory, University of Bern, NASA Jet Propulsion Laboratory and Discovery Communications.

NASA's Discovery Program requested proposals for spaceflight investigations in June 2010. A panel of NASA and other scientists and engineers reviewed 28 submissions and selected three for further study including Comet Hopper. After concept studies are reviewed in 2012, NASA will select one mission to continue development efforts leading up to launch in 2016. The selected mission will be cost-capped at $425 million, not including launch vehicle funding.

For more information on NASA Goddard visit:

News Archive Search  Go!
Show  results per page
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 Writers: Courtney O'Connor and Bill Dunford
Producer: Greg Baerg
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
> NASA Advisory Council
> Open Government at NASA
Last Updated: 5 Dec 2011