NASA’s recent discovery of Kepler-186f, the first habitable Earth-sized planet is big news in humankind’s long search for extraterrestrial life.
A universe full of exoplanets: Thanks to the Kepler Space Telescope, which was launched in 2009 to hunt planets across the universe, we’ve managed to find around 1800 exoplanets so far, many of which have been discovered in just the last year or so.
- Top two archive photos courtesy of the Museum of the Rockies
- Middle two: Jason Thompson for NPR
- Last two: Maggie Starbard/NPR