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The fraction of Sun-like stars having planets of different sizes, orbiting within 1/4 of the Earth-Sun distance (0.25 AU) of the host star. The graph shows that planets as small as Earth (far left) are relatively common compared to planets 8.0x the size of Earth (similar to Jupiter). For example, 7.9% of Sun-like stars harbor a planet with a size of 1.0 - 1.4 times the size of Earth, orbiting inward of 1/4 the Earth-Sun distance (closer than Mercury's distance from the Sun). There are increasing numbers of planets from 8x the size of Earth down to 2.8x Earth. Remarkably, the number of planets smaller than 2.8x Earth is approximately constant with planet size, down to the size of our Earth. The gray indicates the planets discovered in this study, and the orange represents the correction applied to account for planets our software would miss statistically, typically about 20%.

AAS Long Beach, January 2013 – Download Presentation (PDF) → January 8, 2013

Systematic errors vary across the Kepler field of view

AAS Anchorage, June 2012 – Download Poster (PDF) → June 12, 2012

ExSSII

Extreme Solar Systems II → September 12, 2011

APS-Denver

American Physical Society April Meeting → May 5, 2009