"Its extremely low density makes it a real anomaly among the more than five thousand exoplanets discovered to date," explained Khalid Barkaoui, a postdoctoral researcher at the University of Liège EXOTIC Laboratory, according to
Scientists believe that its low density is because it is made up of hydrogen and helium, according to EurekAlert!. This is the second least dense planet discovered after Kepler 51d, which was found in 2014, and is smaller than WASP-193b, according to Barkaoui.It orbits a star similar to the Sun, a little over every six days, over 1,200 light years away and is thought to be six billion years old.Data from the planet was collected between 2006 and 2008 and again from 2011 to 2012 by the WASP located in the southern hemisphere.
They are very hard to see with telescopes because they are often hidden by the brightness of their star A good way to spot an exoplanet is to look for wobbly stars, because a disruption to starlight can indicate that a planet is orbiting it and therefore blocking out light on occasion
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