Ion Propulsion: The Key to Deep Space Exploration By Evan Gough November 3, 2015 Evan Gough Evan Gough is a science-loving guy with no formal education who loves Earth, forests, hiking, and heavy music. He's guided by Carl Sagan's quote: "Understanding is a kind of ecstasy." Previous Article ← Protecting Juno's Heart Next Article New Visualization Shows Incredible Variety of Extraterrestrial Worlds →