BPM 37093, now known as the biggest diamond in the galaxy, 50LY away from Earth in the constellation Centaurus, has a diameter of 4000 km.conspiracy-minded folk would call it an artifact of a kardashev type II civilization :) also, earth is 6000 km.
BPM 37093, now known as the biggest diamond in the galaxy, 50LY away from Earth in the constellation Centaurus, has a diameter of 4000 km.conspiracy-minded folk would call it an artifact of a kardashev type II civilization :) also, earth is 6000 km.