Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. All of these planets orbit the
Sun, the only star in the solar system. When they orbit, they revolve around the ...
SATURN AND NEPTUNE DISCOVERED
http://adc.astro.umd.edu/adc/quick_ref/hst_saturn_nicmos.jpg
The solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. All of these planets orbit the Sun, the only star in the solar system. When they orbit, they revolve around the Sun. When they rotate, the planets spin on their axis. Meteorites are masses of rock and metal that float around in space. If an astronaut were ever to go to space, and visit the moon, he would be floating around because it has minimal gravity. Gravity is the force that pulls objects and people to the center of the planet or celestial object. On larger planets, there is more gravity, and on smaller planets, there is less gravity. Many planets also have moons and rings. For example, Earth has one moon. The moons orbit around the planet and rotate on their own axis. Two interesting planets to study is Neptune and Saturn. Saturn is the sixth planet from the Sun and has 56 moons and seven rings. Saturn’s atmosphere is made up of mostly hydrogen and helium. It doesn’t have a solid surface, because it is made up of liquid and gas. Saturn’s core is made up of iron, silicon, oxygen, and carbon. Saturn’s diameter is 74,898 miles! If someone could slice Saturn in half, that person could fit more than 750 Earths into Saturn! The cloud temperature is -285° F, which is freezing! Neptune, the eight planet from the sun, has 13 moons, and six rings. The atmosphere of Neptune is made out of hydrogen, and methane. Its surface is made of clouds and gas, and its core is solid ice and rock. The diameter of Neptune is 30,775 miles. As the fourth
largest planet, over 60 Earth’s could fit into Neptune! Also, Neptune’s outer cloud temperature is -355 °F! These two planets do not have much in common. One of the things that does make the planets alike are that they both do not have firm or solid surfaces. Their surfaces are made out of gas, clouds, and liquids. Another thing that these two planets have in common is that they both have helium, and hydrogen gas in their atmosphere. The last thing that these two planets have in common is that they are both outer planets. Because Saturn and Neptune don’t have a lot in common, they have many differences. First of all, Saturn has 56 moons and Neptune has 13 moons. The second difference is that Saturn’s core is iron (because Saturn is closer to the Sun), and Neptune’s core is solid ice and rock( because it is farther away from the Sun). One of the last differences is that Saturn has seven rings and Neptune has six rings. Did you know that Saturday is named after Saturn? Also, if anyone were to go to Saturn, it would be extremely stormy! In 1989, a spacecraft called Voyager 2 flew to Neptune to take a close-up photo of Neptune. Neptune was actually discovered when people were studying Uranus! There are many other interesting facts about the Solar System! Now you know more about the amazing two planets, Neptune and Saturn, their differences, and how they are alike!
[1]
