Book Report “When is the planet not a planet: The story of Pluto” By Leonardo Soto

“When is the planet not a planet: The story of Pluto Explains how scientists determine what can be called a planet Talks about important astronomers and the discoveries they made Explains the history behind the discovery of the 9 planets

Important Astronomers Nicolas CopernicusGalileo Galilei Changed the theory of earth being the center of the universe Discovered the SUN is the center of the solar the system Discovered planets orbit the sun Invented telescopes Discovered the milky way is made up of billions of stars Discovered Jupiter has moons

Pluto: Not a Planet In 2004, Pluto was determined not a Planet. A planet ◦Orbits around the Sun ◦Is round because of gravity ◦Clears the neighborhood of its orbit Pluto not a planet because it does not “clear the neighborhood”

Fun Facts Pluto is known as a “Dwarf Planet” In the old days, people thought planets were Gods that were walking in the heavens. In Janury 2006 NASA launches a mission to Pluto. This will help to see if Pluto is really a planet or not.

The Solar System