Comparing Two Planets

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1. How are the outer planets similar to each other? The outer planets are similar to each other as they all have significant amounts of hydrogen and helium in their atmosphere. All the outer planets are believed to have a rock core. They each have their own unique ring system. While none of these planets can support life as we know it, they do support many orbiting moons. The outer planets have large masses, in comparison to the inner planets. All of the outer planets are named after Greek or Roman gods. These outer planets do not have solid surfaces, they consist mainly of gases and ice. 2. How are the outer planets different from each other? The outer planets are different from each other in many ways. First of all, Saturn is the only planet within our solar system that is less dense than water. An important difference to note, is that Jupiter and Saturn are referred to as gas giants, composed of mainly helium and hydrogen gases, while Uranus and Neptune are actually more like ice giants, due to their composition of ices. All of these planets are also…show more content…
In the 19th century, the definition changed to distinguish only “large” bodies orbiting around the sun as planets. After the classification of Pluto being a planet, the definition of a planet soon changed again. Now, a body must be have a relatively round shape, not be a moon, and must not have completely cleared the area around its orbit. I think that the changing definition of a planet since the 16th century, shows scientific accuracy, as scientists work with the most advanced technology to further understand what we know. These changes show that scientists do make mistakes sometimes and that they do need to alter their information to correct such mistakes. By correcting these mistakes, scientists are showing accuracy, as they make changes to what they once thought to be true to match up with what they now know to be
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