Ball Aerospace & Technologies Corporation operates the flight system with support from the Laboratory for Atmospheric and Space Physics at the University of Colorado in Boulder.NASA has unveiled the complete set of data from the first four years of the agency's Kepler Space Telescope mission, which stared at a single patch of the sky in the search for alien planets. NASA Ames managed the Kepler and K2 missions for NASA's Science Mission Directorate. ![]() “Now that we've trained ExoMiner using Kepler data, with a little fine-tuning, we can transfer that learning to other missions, including TESS, which we're currently working on,” said Valizadegan. “These 301 discoveries help us better understand planets and solar systems beyond our own, and what makes ours so unique,” said Jenkins.Īs the search for more exoplanets continues – with missions using transit photometry such as NASA’s Transiting Exoplanet Survey Satellite, or TESS, and the European Space Agency's upcoming PLAnetary Transits and Oscillations of stars, or PLATO, mission – ExoMiner will have more opportunities to prove it's up to the task. But they do share similar characteristics to the overall population of confirmed exoplanets in our galactic neighborhood. None of the newly confirmed planets are believed to be Earth-like or in the habitable zone of their parent stars. “ExoMiner is highly accurate and in some ways more reliable than both existing machine classifiers and the human experts it's meant to emulate because of the biases that come with human labeling.” “When ExoMiner says something is a planet, you can be sure it's a planet,” added Hamed Valizadegan, ExoMiner project lead and machine learning manager with the Universities Space Research Association at Ames. The paper also demonstrates how ExoMiner is more precise and consistent in ruling out false positives and better able to reveal the genuine signatures of planets orbiting their parent stars – all while giving scientists the ability to see in detail what led ExoMiner to its conclusion. But until ExoMiner, no one was able to validate them as planets. All 301 machine-validated planets were originally detected by the Kepler Science Operations Center pipeline and promoted to planet candidate status by the Kepler Science Office. In a paper published in the Astrophysical Journal, the team at Ames shows how ExoMiner discovered the 301 planets using data from the remaining set of possible planets – or candidates – in the Kepler Archive. ![]() ![]() A planet is “validated” using statistics – meaning how likely or unlikely it is to be a planet based on the data. ![]() What is the difference between a confirmed and validated exoplanet? A planet is “confirmed,” when different observation techniques reveal features that can only be explained by a planet. “We can easily explain which features in the data lead ExoMiner to reject or confirm a planet.” “Unlike other exoplanet-detecting machine learning programs, ExoMiner isn't a black box – there is no mystery as to why it decides something is a planet or not,” said Jon Jenkins, exoplanet scientist at NASA's Ames Research Center in California's Silicon Valley.
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