Our solar system is made up of a star—the Sun—eight planets,
The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune

Explanation:
In our solar system, there are currently only eight planets recognized. This means that the statement "There are nine planets in our solar system" is false.

Background Information:
To understand why there are only eight recognized planets in our solar system, it is important to have some background information about the definition of a planet.

In 2006, the International Astronomical Union (IAU) established a definition for a planet. According to this definition, a celestial body must meet three criteria to be classified as a planet:

1. It must orbit the Sun.
2. It must be spherical in shape, meaning it has enough mass for its gravity to pull it into a round shape.
3. It must have cleared its orbit of other debris, meaning it has become gravitationally dominant in its vicinity.

The Eight Planets:
Based on the criteria set by the IAU, the following eight celestial bodies in our solar system are classified as planets:

1. Mercury: It is the closest planet to the Sun and has a diameter of about 4,879 kilometers.
2. Venus: It is the second planet from the Sun and is known for its thick atmosphere and extreme temperatures.
3. Earth: Our home planet, which sustains life and has a diameter of about 12,742 kilometers.
4. Mars: Also known as the "Red Planet," Mars has a thin atmosphere and is the fourth planet from the Sun.
5. Jupiter: The largest planet in our solar system, with a diameter of about 139,820 kilometers.
6. Saturn: Known for its beautiful rings, Saturn is the second-largest planet and has a diameter of about 116,460 kilometers.
7. Uranus: It is the seventh planet from the Sun and is characterized by its unique sideways rotation.
8. Neptune: The farthest planet from the Sun, Neptune is known for its vivid blue coloration.

Pluto - No Longer a Planet:
Until 2006, Pluto was considered the ninth planet in our solar system. However, with the establishment of the new definition by the IAU, Pluto no longer meets the criteria to be classified as a planet. It is now categorized as a "dwarf planet" instead, along with other celestial bodies like Eris and Ceres.

Conclusion:
Based on the current scientific understanding and the definition established by the IAU, there are only eight recognized planets in our solar system. Pluto, previously considered the ninth planet, is now classified as a dwarf planet.