Observatory on Instagram: "🪐 With over 80 moons, this gas giant has a year that lasts 29 Earth years, but its day is just 10.7 hours long due to its rapid rotation. The Cassini spacecraft revealed stunning details about Saturn’s atmosphere, moons, and rings, showing us a world of wonder. Its helium and hydrogen-rich atmosphere hides a rocky core beneath, and Saturn is so light that it would float in water! As the second-largest planet in our solar system, you could fit over 760 Earths inside it