Solar System moons. The centaurs and many short-period comets also orbit in this region. Due to their greater distance from the Sun, the solid objects in the outer Solar System contain a higher proportion of volatiles, such as water, ammonia, and methane than those of the inner Solar System because the lower temperatures allow these compounds to remain solid. The four outer planets, or giant planets (sometimes called Jovian planets), collectively make up 99% of the mass known to orbit the Sun. Jupiter and Saturn are together more than 400 times the mass of Earth and consist overwhelmingly of hydrogen and helium.
The empire on which the sun never sets Empire". From the mid-nineteenth century, the image of the sun never setting can be found applied to Anglophone culture, explicitly including both the British Empire and the United States, for example in a speech by Alexander Campbell in 1852: "To Britain and America God has granted the possession of the new world; and because the sun never sets upon our religion, our language and our arts...". By the end of the century, the phrase was also being applied to the United States alone. An 1897 magazine article titled "The Greatest Nation on Earth" boasted, "[T]he sun never sets on Uncle