Among thousands of known exoplanets, astronomers flag three that are actually stars MIT AAS_Publishing
, MIT astronomers report that three, and potentially four planets that were originally discovered by NASA's Kepler Space Telescope are in fact misclassified. Instead, these suspected planets are likely small stars.
"Overall, this study makes the current list of planets more complete," says study author Avi Shporer, a research scientist at MIT's Kavli Institute for Astrophysics and Space Research."People rely on this list to study the population of planets as a whole. If you use a sample with a few interlopers, your results may be inaccurate. So, it's important that the list of planets is not contaminated.
"Suddenly we had a system where we saw this ellipsoidal signal which was huge, and pretty immediately we knew this could not be from a planet," Shporer says."Then we thought, something doesn't add up." The team confirmed that Kepler-854b was a planetary"false positive"—not a planet at all, but instead, a small star orbiting a larger host star. Then they wondered: Could there be more?
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