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Headed to History
1 Headed to History
2 First Earthling in Space
3 Intrepid -- Prior to Landing
4 Viking Checkup
5 Mars Helicopter Concept
Soviet cosmonaut Yuri Gagarin before his historic flight.
Hal Levison
Scientist
Picture of Hal Levison
"Being interested in the science is not enough. You have to enjoy the nuts and bolts of science; otherwise you won't enjoy going to work every day." More 
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Eyes on Cassini: An Epic 3d Tour of Saturn
Moon.nasa.gov: It's a New Moon
NRC Planetary Science Decadal Survey
Exploration Timeline
Robotic Firsts
 
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Sputnik 1 Explorer 1 Luna 1 Luna 2 Luna 3 Pioneer 5 Mariner 2 Mariner 4 Luna 9 Venera 3 Luna 10 Lunar Orbiter 1 Venera 4 Surveyor 6 Zond 5 Surveyor 3 Luna 16 Lunokhod 1 Venera 7 Mariner 9 Mars 2 Mars 3 Pioneer 10 Pioneer 10 Mariner 10 Venera 9 Helios 2 Viking 1 ISEE-3 Voyager 1 Voyager 1 Pioneer 11 Venera 13 Pioneer 10 Vega 1 ISEE-3 Voyager 2 Giotto Voyager 2 Voyager 1 Hubble Galileo Giotto Hiten Galileo Galileo Ulysses Galileo Galileo Prove Galileo Mars Pathfinder Sojourner Voyager 1 Lunar Prospector NEAR NEAR Deep Space 1 Stardust Stardust Cassini Genesis Voyager 1 Spirit Huygens Deep Impact Stardust Opportunity Hayabusa MESSENGER MSL/Curiosity Rosetta Dawn New Horizons Juno Robotic Firsts
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