If you thought Kim Kardashian's engagement ring was a ridiculous rock, you haven't seen the ludicrously large diamond planet, J1719-1438. Scientists at the Swinburne University of Technology in Melbourne recently spotted this celestial body that's so dense, it's believed to be crystalline carbon -- i.e. a ginormous diamond similar in size to Jupiter. Since the 60s, astrophysicists like Marc Kuchner have theorized that carbon-heavy stars can burn out, crystallize and form diamonds under the right pressure.
