The most common size of planet Kepler found doesn’t exist in our solar system - a world between the size of Earth and Neptune - and we have much to learn about these planets. Kepler has discovered a diversity of planet types, opening our eyes to new possibilities.

We still have much to learn about whether any of them could host life. Kepler has shown us our galaxy is teeming with terrestrial-size worlds the most recent analysis of Kepler’s discoveries concludes that 20 to 50 percent of the stars in the sky are likely to have small, possibly rocky planets similar in size to Earth within the habitable zone of their parent stars, where water could pool on the planet surface. Kepler has proven there are more planets than stars in our galaxy - and knowing that revolutionizes our scientific understanding of our place in the cosmos. NASA's Kepler mission revolutionized our scientific understanding of our place in the cosmos by discovering that:

The Top Science Results from the Kepler Mission Kepler leaves a legacy of more than 2,600 planet discoveries from outside our solar system, many of which could be promising places for life. After nine years in deep space collecting data that revealed our night sky to be filled with billions of hidden planets – more planets even than stars – NASA’s Kepler space telescope was retired.

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