Transcript Book Report “When is the planet not a planet: The story of Pluto”

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



Copernicus
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
Galileo Galilei

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