Saturn is so remarkably un-dense that if you could find a bathtub large enough to hold it, the entire gas giant would actually float on top of the water.

A closer look

Saturn is so remarkably un-dense that if you could find a bathtub large enough to hold it, the entire gas giant would actually float on top of the water. Composed almost entirely of hydrogen and helium, the planet is a colossal, majestic sphere of gas that possesses a density significantly lower than that of liquid water. Of course, the sheer gravity of a bathtub that massive would instantly crush the entire solar system into a singularity, but let us not ruin a fun thought experiment with catastrophic astrophysics. It is hilarious to imagine the jewel of our solar system, with its spectacular rings and dozens of moons, bobbing around like a cheap plastic duck in a cosmic tub. We look up at these terrifyingly massive celestial bodies with awe, completely ignoring the fact that one of them is basically just an oversized pool toy