Jupiter
It is scientific name for humans. Scientists have developed a system to name all the species on this planet. Each animals has a species name and a genus name.
Scientists believe that to be the case with the moon orbiting Neptune since it is not going in the expected direction.
No scientists say that. Scientists know that Pluto is a dwarf planet, and not one of the 8 major planets of our solar system.
I think that scientists have changed the classification system since it was first developed because, the world has grew example technology and they wanted to update it. I also think scientists have changed the classification system since it was first developed to make it easier.
Planet X has not been observed or discovered yet, so its color is unknown. It is a hypothetical planet that some scientists believe may exist in the outer regions of the solar system, but its characteristics are speculative at this point.
Scientists that study the solar system.
Carl Linnaeus, a Swedish botanist, developed the binomial naming system that is used by scientists today. This system assigns each organism a two-part name consisting of the genus and species.
I believe Saturn in a planet. It's a planet in our solar system.
No Pluto isn't a planet anymore. Scientists said its too small to be counted as a Planet.
None in our solar system. Scientists believe that Venus might have has one like ours millions of years ago, before a 'runaway' greenhouse effect occurred.
Unix
Technically, yes. But, just a few years ago, scientists discovered a red, round, sphere-shaped hunk of rock that scientists believe may be a ninth planet(well, tenth planet if you count Pluto). It is still unclear if it really is another planet or not.