Have you ever wondered how scientists classify an object in space as a planet, a dwarf planet, a comet, or some other kind of space object? Go through the What is a Planet? slideshow on the student esheet Is Pluto a Planet? to learn more about the objects in space.
According to the International Astronomical Union (IAU), what are the characteristics of a planet?
What are some examples of planets?
According to the IAU, what are the characteristics of a dwarf planet?
What are some examples of dwarf planets?
Why might it be useful to define the characteristics of a planet or a dwarf planet?