BA here reports about a planet as dense as lead. The planet is the size of Jupiter, but it has around 21.6 times the mass of Jupiter! Now, that is a whole lot’a condensed matter there. This one is even stranger by the fact that brown dwarves are objects around 15 times the mass of Jupiter, and this one is hard to tell whether to place it in planet or brown dwarf category. (Brown dwarves are failed stars that temporarily started fusion, but later cools down, not having enough mass to sustain fusion) Now, this is one of those “limit of our knowledge” objects, and I can’t wait for more objects that our outside that boundary to be found.
Planet as Dense as Lead