All of the water on Earth as a planet
How big would a planet be if it was formed by all the water on Earth? According to the U.S. Geological Survey, the answer is, well, positively puny. Stretching at just 860 miles across its diameter, this hypothetical planet is unexpectedly small, especially when we think so much about the planet Earth as a water planet. Guess all these water conservation messages do stand for something.