----- 宇宙生活:在种族背后看内心深处,发现地球之外的生命
The Kepler space telescope spent four years looking for Earth-like planets in our galaxy. A revolution in thinking about our place in the universe resulted. Are Earths commonplace, or rare? Are we likely to be alone in the universe? Only Kepler could answer these questions. Author Alan Boss, the Chair of NASA's Exoplanet Exploration Program Analysis Group, presents what the Kepler mission found.
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