NASA Jet Propulsion Laboratory California Institute of Technology Skip Navigation menu and search scroll for more What's Happening Now FEATURED NEWS VIDEOS IMAGES previous next New Clues to Boomerang Nebula Mystery What's Up - July 2017 Saturnian Dawn MORE NEWS Get the Newsletter Follow JPL All Missions JPL is the leading U.S. center for robotic exploration of the solar system, and has 19 spacecraft and 10 major instruments carrying out planetary, Earth science and space-based astronomy missions. Current Past Future Proposed VIEW ALL MISSIONS Explore previous next Download our 2017 calendar and celebrate space exploration with us. Detect, track and characterize potentially hazardous asteroids and comets. Download and print our futuristic space tourism posters. PROTOPLANETARY DISK (ARTIST'S CONCEPT) Image of the Day VIEW ALL IMAGES Education and Public Events July 13 & 14 Five Years of Exploring Gale Crater with the Curiosity Mars Rover August 24 & 25 40 Years in Space: Voyager’s Remarkable Journey Continues September 21 & 22 VolcanoBot: Imaging volcanic fissure conduits from the inside out, with implications for lava fountain dynamics MORE EVENTS Science and Technology LEARN MORE Opportunities APPLY NOW Get the Newsletter Follow JPL All About JPL About JPL Executive Council History Annual Reports Contact Us Opportunities Doing Business with JPL Missions Current Past Future Proposed All Galleries JPL Space Images Videos Infographics Photojournal NASA Images Mobile Apps Education Intern Learn Teach News Events News Latest News Press Kits Fact Sheets Media Information Universe Newspaper Public Events Overview Tours Lecture Series Speakers Bureau Team Competitions Special Events Our Sites Asteroid Watch Cassini - Mission to Saturn Earth / Global Climate Change Exoplanet Exploration Juno - Mission to Jupiter Mars Exploration Mars Science Laboratory / Curiosity Rosetta - Understanding Comets Science and Technology Solar System Exploration Eyes on the Solar System Eyes on the Earth Eyes on Exoplanets Spitzer Space Telescope Follow JPL Newsletter Facebook Twitter YouTube Flickr Instagram iTunes UStream RSS Blog Mobile All Social Media NASA NASA Water Cleanup FOIA NASA | CALTECH | PRIVACY | IMAGE POLICY | FAQ | FEEDBACK Site Manager: Jon Nelson Webmasters: Tony Greicius, Martin Perez, Luis Espinoza