Saturn and Its Rings
Saturn and its magnificent rings are on display. The planet is made mostly of hydrogen and helium gas. Super-fast winds combine with heat rising from Saturn’s interior to create the yellow and gold bands seen in the atmosphere.
There are billions of ring particles in the entire ring system. The ring particle sizes range from tiny, dust-sized icy grains to a few particles as large as mountains. Two tiny moons orbit in gaps in the rings and keep the gaps open. Other particles (10's to 100's of meters) are too tiny to see but create propeller-shaped objects in the rings that let us know they are there.
NASA's Cassini spacecraft took the images that were stitched together to make this grand view as it studied Saturn in 2004.
Image credit: NASA/JPL/Space Science Institute