Outer Planet Project
Jupiter is 39 Cm from the sun. Jupiter is the largest planet in the solar system. Jupiter's atmosphere is 90% helium and 10% hydrogen. The core might be as large as Earth and could be 10 times larger. Jupiter ha s 63 moons. Jupiter's four largest moons were first discovered by Galileo Galilei. The four largest moons on Jupiter are Io, Callisto, Ganymede, and Europa.
Saturn is the sixth planet from the sun. Saturn has at least 60 moons. The five largest moons are Titan, Rhea, Dione, Iapetus, and Tethys. Titan is the largest moon of Saturn. Saturn's structure is similar to Jupiter's structure.
Uranus has a deep atmosphere made up of mostly hydrogen. It also contains a little bit of methane. Uranus has at least 27 moons. The two largest moons are Titania and Oberon. Uranus is the 7th planet from the sun. Probe flew by Uranus in 1986.
What Is Uranus?
Neptune was discovered in 1846. Neptune is made of hydrogen, helium, and a tiny bit of methane. Has at least 13 moons. Its largest moon Triton is made of rock with an icy outer layer. It has a surface area of frozen nitrogen and geysers that erupt nitrogen gas .
Ten facts about Neptune