There is a floating ocean of water vapor that holds 140 trillion times the water of all Earth's oceans combined. That's right, in the vast reaches of the cosmos, there exists a cosmic cloud known as the waterhole or W-51, which spans an incredible distance of 10,000 light years. It's a celestial reservoir of water vapor, where the mystery of interstellar water awaits astronomers and scientists to unravel its secrets. So the next time you admire Earth's oceans, remember that the cosmos also harbors an unimaginably massive ocean of its own.