Astronomers just spotted a planet so huge they aren't even sure it's really a planet

Even if you have only cursory knowledge of the planets in our Solar System, you know that Earth is on the smaller end of the spectrum in terms of mass. Mercury and Mars are even smaller, but Saturn and the mighty Jupiter, of course, are on the other end of the spectrum. But in the grand scheme of things, Jupiter isn't actually all that mighty at all, and a new discovery of an absolutely massive planet residing in our galaxy's "bulge" has scientists struggling to explain how it can even be a plan...