|from edge to edge
- Saturn is the second-largest planet and the sixth from the Sun. It is （地球）almost 10 times as far away from the Sun as Earth.
- Saturn tilts significantly on its axis, and its winter hemisphere – the one tilted away from the Sun – tends to turn blue, while its summer hemisphere is yellow.
- Saturn is surrounded by “a thin flat ring. Although they may look solid from a distance, the rings are actually made of many tens of thousands of pieces of ice, with some rock and dust in the mix. The larger chunks are about the size of a car, and from there they descend in size to pebbles, gravel, sand, and smoke.
- They are about 60 feet thick versus an astonishing 180,000 miles from edge to edge. This ratio is comparable to that of a very thin sheet of paper extending across an area as large as a football stadium.
- Similar in some ways to Jupiter, although calmer and smaller, Saturn is a gas giant, with an internal heat source and less-prominent clouds than Jupiter that are also made mostly of hydrogen.
- 天文學托福經典知識高頻單字(Astronomical Telescope)