Dwarf Planets

A dwarf planet is a celestial body that orbits the sun and has enough mass for its gravity to give it a nearly round shape. However, it has not cleared its neighboring region of other objects. The International Astronomical Union (IAU) currently recognizes five dwarf planets in our solar system: Pluto, Eris, Haumea, Makemake, and Ceres.

Characteristics of Dwarf Planets:

• Orbit: Dwarf planets orbit the sun just like other planets, but they have not cleared their orbits of other debris.
• Size: They are smaller than the eight recognized planets in our solar system.
• Shape: Their gravity pulls them into a nearly spherical shape, just like planets.
• Composition: Dwarf planets are composed of rock and ice, similar to the terrestrial and gas giant planets.
• Notable Examples: Pluto, the most famous dwarf planet, was reclassified as such in 2006. It was previously considered the ninth planet in our solar system.

Study Guide:

1. What is a dwarf planet and how is it different from a regular planet?
2. List the five recognized dwarf planets in our solar system.
3. What characteristics do dwarf planets share with regular planets?
4. Why was Pluto reclassified as a dwarf planet in 2006?
5. Research one of the five recognized dwarf planets and create a presentation highlighting its unique features.

Understanding the characteristics and classifications of dwarf planets is important in our exploration and understanding of our solar system. By studying these celestial bodies, we can gain insights into the formation and evolution of our planetary system.