The atmospheres of outer planets like Jupiter and Saturn are made almost totally of hydrogen and helium, even though there is some evidence they include hydrogen compounds. Uranus and Neptune are made primarily of hydrogen compounds, with smaller traces of hydrogen, helium, metal and rock.
<h3>What are the outer planets characteristics?</h3>
The four outer planets have longer orbits and spins, a composition of gases and liquids, severa moons, and rings. The outer planets are made of hydrogen and helium, so they are known as gas giants.
Each layer of outer planets has its own properties, composition, and traits that affects many of the key approaches of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core. Let's take a look at them and see what they have going on.
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