This cosmic water source, equal to 140 trillion times the volume of Earth’s oceans. Astronomers Found the Biggest Water Reservoir, A 140 Trillion Times Earth’s Oceans. The quasar, known as APM 08279+5255, harbors a supermassive black hole 20 billion times the mass of our Sun. the largest and most distant water reservoir ever detected in the universe. This cosmic water source, equal to 140 trillion times the volume of Earth’s oceans, surrounds a quasar more than 12 billion light-years away. The finding challenges previous assumptions about the early universe and suggests that water has been a fundamental component of galaxies since their formation.