The History of Pluto's Classification in Our Solar System

What are the reclassification criteria for planets?

• Orbiting the moon, having sufficient mass, and clearing its orbit.

• Orbiting the sun, having sufficient mass, and clearing its orbit.

• Orbiting the earth, having sufficient mass, and clearing its orbit.

• Orbiting the sun, having insufficient mass, and not clearing its orbit.

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NGSS.MS-PS2-4

Why was Pluto reclassified as a dwarf planet in 2006?

• Due to its large size and unique orbit

• Because it is made mostly of ice and rock

• As a result of its small size and failure to clear its orbit

• For being the farthest planet from the Sun

How did Pluto's reclassification impact the ongoing debates about the definition of a planet and celestial body classification?

Who discovered Pluto in 1930?

• Galileo Galilei

• Isaac Newton

• Clyde Tombaugh

• Albert Einstein

Pluto's unique orbit and characteristics led to its controversial classification in our solar system. What is Pluto's classification?

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