Explanation:

Introduction:
Our solar system consists of eight planets that revolve around the sun. Pluto is no longer considered a planet in our solar system.

Why is Pluto no longer a planet?
In 2006, the International Astronomical Union (IAU) reclassified Pluto as a "dwarf planet." The IAU defined a planet as a celestial body that orbits the sun, is round or nearly round in shape, and has cleared its orbit of other debris. Pluto does not fit the last criterion, as it shares its orbit with other objects in the Kuiper Belt.

Other planets in our solar system:

- Neptune: Neptune is the eighth planet from the sun and is the fourth-largest planet by diameter. It has a blue color due to the presence of methane in its atmosphere.
- Mars: Mars is the fourth planet from the sun and is often referred to as the "Red Planet" due to its reddish appearance. It is a rocky planet and has the largest volcano in the solar system, Olympus Mons.
- Jupiter: Jupiter is the largest planet in our solar system and is known for its bright stripes and swirling storms, most notably the Great Red Spot. It is a gas giant and is primarily composed of hydrogen and helium.

Conclusion:
Pluto was once considered the ninth planet in our solar system but has since been reclassified as a dwarf planet due to its failure to meet the IAU's criteria for a planet. The other planets in our solar system include Neptune, Mars, and Jupiter.

Pluto is now not a planet in our solar system.