National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Facebook Twitter YouTube Facebook Twitter YouTube Flickr iTunes
Follow Us
Explorer 49
Explorer 49 (click to enlarge)

Explorer 49
Date: 10 Jun 1973

Explorer 49 was to be placed into lunar orbit in order to be able to use the moon as a shield against radio interference from Earth as it listened for radio emissions from the rest of our solar system, the galaxy and beyond.

The spacecraft achieved lunar orbit and was used successfully to study low-frequency radio emissions from sources including the sun, Jupiter, the galaxy and extra-galactic sources.

With its vast antenna array, Explorer 49 was the largest (in physical dimensions) lunar orbiter of the 20th century.

Credit: NASA

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 Jun 2013