Q:

# How do you label the parts of the solar system?

A:

Begin labelling a diagram of the solar system by labelling the center star as the sun. Then, label the closest planet to the sun as Mercury, the second-closest as Venus, the third-closest as Earth and the fourth-closest as Mars. The next-closest body from the sun may represent either Ceres or Jupiter, depending on whether the diagram features dwarf planets such as Ceres and Pluto. After Jupiter comes Saturn, Uranus and Neptune, in that order, and then Pluto if shown.

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Mercury is the smallest planet and completes a full orbit around the sun every 88 days. Venus is very similar in size and mass to Earth, but it has a much thicker atmosphere, making it the hottest out of all of the planets with surface temperatures capable of melting lead. Earth is the only planet that scientists can confirm supports life, as of 2015. One factor that makes Earth inhabitable is its ideal distance from the sun, making it neither too hot nor too cold to support life forms. By comparison, Mars, the next-nearest planet to the sun, experiences very cold temperatures than can dip as low as -140 degrees Celsius.

Jupiter is larger and heavier than the rest of the planets with a mass over 2.5 times the combined mass of the other planets. Although Saturn is nearly as big as Jupiter, its mass is significantly lower due to the planet's lower density. Uranus has 27 named moons, while Neptune has 13.

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