Concept
Project
Fall 2013
Non Examples of Planets
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#1
Stars
A star is a large ball of gas that is created
in a nebula. A nebula is a cloud of gas and dust found in space. Stars color depend on the age and amount of heat within the star.
Stars do not orbit. Also, stars are not made out of a solid, so they do not have a consistent shape. Lastly, they do not have the ability to clear things out of their path. These elements combined do not qualify a star as a planet.
# 2
Pluto
Pluto is called a "dwarf planet". Although it was previously considered one of the planets in our solar system, it was downgraded to the definition of "dwarf planet" in 2005.
Pluto rotates around the sun, however it's orbit is in an oval shape opposed to a cirular shape. Pluto also has a round shape and gravity. The only element not qualifying Pluto as a proper planet is it's inability to clear objects out of it's path. These elements combined do not qualify Pluto to be a planet.
# 3
Moon
Why isn't the moon a planet? It has many of the properties of a planet, and is the largest moon in the solar system in comparison to it's orbiting planet's size.
The moon has a round shape and gravity. However, the moon does not orbit around the sun, it orbits around Earth. Lastly, the moon is not large enough to clear an orbital path around the sun. These componenets combined do not qualify the moon as a planet.
# 4
Asteroid
An asteroid is a rocky object spanning up to a hundred miles wide orbiting throughout space. Some asteroids orbit the sun, while others orbit various belts between planets.
Asteroids do not have the ability to clear their own orbital. Furthermore, although some asteroids orbit the sun, not all asteroids orbit the sun. Lastly, asteroids are not in a spherical shape. These attributes combined do not qualify asteroids as planets.