Pluto

Pluto is a dwarf planet located in the outer regions of the solar system. It was considered the ninth planet in the solar system until 2006 when it was reclassified as a dwarf planet by the International Astronomical Union.

Characteristics of Pluto:

1. Size: Pluto is smaller than the Earth's moon, with a diameter of about 2370 kilometers.
2. Orbit: It takes Pluto about 248 years to orbit the sun. Its orbit is highly elliptical and inclined, which means it is not on the same plane as the eight major planets.
3. Composition: Pluto is primarily composed of rock and ice. It has a thin atmosphere consisting of nitrogen, methane, and carbon monoxide.

Discovery of Pluto:

Pluto was discovered in 1930 by American astronomer Clyde Tombaugh. It was initially thought to be the ninth planet in the solar system due to its size and orbit. However, with advancements in technology and a better understanding of the outer solar system, Pluto was reclassified as a dwarf planet in 2006.

Study Guide:

To study and learn more about Pluto, consider the following topics:

1. Comparing the characteristics of Pluto with the other planets in the solar system.
2. Exploring the history of Pluto's discovery and its reclassification as a dwarf planet.
3. Understanding the composition and atmosphere of Pluto.
4. Investigating the current and future space missions to explore Pluto and its moons.

By diving into these topics, you can gain a comprehensive understanding of Pluto and its place in the solar system.

[Pluto] Related Worksheets and Study Guides:

• Our Solar SystemScience • Seventh Grade
• Our Solar SystemScience • Eighth Grade