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How to find a planet? (Not what the actual data look like) @GeertHub www.geert.io github.com/barentsen Geert Barentsen
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Are we alone?
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Image: NASA
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Detecting Planet Transits
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Jupiter Earth Small planets are really hard to find
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Jupiter Neptune 2 x Earth Earth Small planets are really hard to find
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* •need to look at the right place • at the right time •and measure the brightness of stars • with extreme accuracy
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NASA’s Kepler Mission “Are Earth-like planets common?”
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* Kepler was launched on 6 March 2009 Attached to a big telescope 100 megapixel camera (100 deg2) Makes movies of stars! The Kepler Spacecraft
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* March 6, 2009
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* The Kepler Field of View
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• So what does the data look like?
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Exoplanet Detections, 1989-1995 Radius Relative to Earth Orbital Period in days Earth
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Radius Relative to Earth Orbital Period in days Earth Jupiter Exoplanet Detections, 1989-1995
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Radius Relative to Earth Orbital Period in days Exoplanet Detections, 1995-2009
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Radius Relative to Earth Orbital Period in days Earth Exoplanet Detections, 1995-2013
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Too big! Just right. Too small!
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2009-2013 Kepler observed 200,000 stars over 4 years, finding 4,496 candidate planets
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And then it BROKE
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Balancing Solar Pressure
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Kepler now changes its pointing every 3 months ecliptic This is called the K2 Mission
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The Pleiades
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Photometry of the Seven Sisters
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*
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Are we alone?
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