Scientists from Princeton University and NASA have confirmed that 1,284 objects observed outside Earth’s solar system by NASA’s Kepler spacecraft are indeed planets. It is the largest single announcement of new planets to date and more than doubles the number of confirmed planets discovered by Kepler so far to more than 2,000. Kepler, which launched in 2009 and ended data collection for its primary mission in 2013, precisely measured the brightness of many stars simultaneously in order to find the dimming caused by planets as they cross in front of their home star. This photo shows a section of the Milky Way galaxy that includes the Kepler field of view. (Photo by Carter Roberts, NASA)
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