Two ten-billion solar mass galactic super-massive black holes are discovered. One in NGC3842, a galaxy in the direction of the Leo constellation, the other in NGC 2889, in the direction of Coma Berenices, both somewhat over 300 million light years away. Both of these are 50% larger, at least, than the previous largest known, the black hole at the centre of M87 and thousands of times heavier than the black hole at the centre of the Milky Way. The event horizons are calculated to be 200 times the radius of the orbit of Earth - 5 times further than the orbit even of Pluto. Or about 20 billion miles - roughly twice as far as Voyager 1 is now from the Sun. Nature paper here.