Introduction to The Solar System Planets


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The solar system is made up of the sun, eight planets, dwarf planets, and their moons, asteroids, comets, and meteoroids. It formed 4.6 billion years ago from a huge cloud of dust and gas. As the cloud collapsed, it began to spin and flatten into a disk.

When it comes to the planets in the solar system, there is a lot to learn about each one! Here is a rundown of each planet.

1) Mercury

A group of people in a dark cloudy sky

Yes, that’s right, the solar system’s smallest and innermost planet is Mercury! Mercury is only a little bigger than Earth’s moon. It has a thin atmosphere made up of oxygen, sodium, hydrogen, helium, and potassium. The surface of Mercury is covered in craters. It is very hot during the day but very cold at night.

2) Venus

A windmill in the background

The second planet from the sun is Venus. Venus is the solar system’s hottest planet! It has a thick atmosphere made up of carbon dioxide and sulphuric acid. The surface of Venus is also covered in craters. However, there are some big differences between Mercury and Venus. For one, Venus doesn’t have any moons. Secondly, the day on Venus is longer than the year!

3) Earth

The third planet from the sun is Earth! Earth is the only planet in the solar system that supports life. It has a thick atmosphere made up of nitrogen and oxygen.

4) Mars

The fourth planet from the sun is Mars. Mars is the solar system’s coldest planet! It has a thin atmosphere made up of carbon dioxide, nitrogen, and argon. The surface of Mars is covered in craters. However, there are some big differences between Earth and Mars. For one, Mars doesn’t have any oceans. Secondly, the day on Mars is shorter than the year!

5) Jupiter

The fifth planet from the sun is Jupiter. Jupiter is the solar system’s largest planet! It has a thick atmosphere made up of hydrogen and helium. The surface of Jupiter is covered in clouds. However, there are some big differences between Jupiter and the other planets. For one, Jupiter has a strong magnetic field. Secondly, Jupiter has a lot of moons!

6) Saturn

The sixth planet from the sun is Saturn. Saturn is the solar system’s second-largest planet! It has a thick atmosphere made up of hydrogen and helium. The surface of Saturn is covered in clouds. However, there are some big differences between Jupiter and the other planets. For one, Saturn doesn’t have a strong magnetic field. Secondly, Saturn has a lot of moons!

7) Uranus

The seventh planet from the sun is Uranus. Uranus is the solar system’s third-largest planet! It has a thin atmosphere made up of hydrogen and helium. The surface of Uranus is covered in clouds. However, there are some big differences between Jupiter and the other planets. For one, Uranus doesn’t have a strong magnetic field. Secondly, Uranus has a lot of moons!

8) Neptune

The eighth planet from the sun is Neptune. Neptune is the solar system’s fourth-largest planet! It has a thin atmosphere made up of hydrogen and helium. The surface of Neptune is covered in clouds. However, there are some big differences between Jupiter and the other planets. For one, Neptune doesn’t have a strong magnetic field. Secondly, Neptune has a lot of moons!

9) Pluto

The ninth planet from the sun is Pluto. Pluto is the solar system’s smallest planet! It has a thin atmosphere made up of nitrogen and methane. The surface of Pluto is covered in ice. However, there are some big differences between Jupiter and the other planets. For one, Pluto doesn’t have a strong magnetic field. Secondly, Pluto has a lot of moons!

These are the planets in the solar system! Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Each one is special and has its own set of characteristics that make it unique. We hope you have enjoyed learning about them!

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