Thank you for everything- You have inspired us to be our true selves.... Scientists.
For Dr. McLaughlin

Table of Contents
What are comets?.... pages 3-4 News article....page 21
What are comets made of?.... pages 5-6 Resources.... page 22
What are parts of a comet?.... pages 7-8
Where do comets come from?.... pages 9-10
Famous Comets: Halley's Comet.... page 11-12
Comet Activity.... page 13-14
Comet Video Resource... page 15
What is an asteroid?.... page 16
Classifications of asteroids....page 17
Who discovered the asteroid belt?.... page 18
What is the asteroid belt?.... page 19
Children's Book.... page 20
Comets are small celestial bodies that orbit the Sun. They are often referred to as "dirty snowballs."
What are comets?
What are comets? Cont.
They are left over from the formation of stars and planets billions of years ago.

What are comets made of?
Comets are made of water ice, in which dust particles and rocky material are embedded.

What are comets made of? Cont.
They are composed of frozen gases such as carbon dioxide, methane, and ammonia,

What are the parts of a comet?
Comets have three parts to them; the nucleus, coma, and tail.

What are the parts of a comet? Cont.
The coma is created as the ice in the nucleus is warmed by the Sun and vaporizes. Comets can develop two tails as they travel closer to the Sun: a straight gas tail and a curved dust tail.

Where do comets come from?
There are two places that comets may have come from. Some scientists believe that comets are leftovers of old debris from the creation of the Solar system. They are referred to as the "dirty snowballs" of space. Because they were formed in the dawn of our solar system, they hold a lot of information about the early formation of our solar system. It is believed that comets brought organic compounds to Earth and other planets.




Other scientists identify that comets take more than 200 years to orbit around the sun originate from the Oort Cloud, which Danish astronomer Jan Oort proposed to be a huge cloud where comets reside that sits at the outer reaches of our Solar System.

Famous Comets: Halley's Comet
Halley's Comet is a short-period visible comet that is visible from earth every 75-76 years. In 1705, astronomer Edmond Halley used Newton's theories of gravitation and motion to compute the orbits of many comets.
Halley's Comet is so famous because it marked the first time astronomers understood that comets could be repeat visitors to the night sky. Scientists have now discovered that Halley's Comet has been appearing as long as 2,000 years ago.
Halley's dimensions are 9.3 by 5 miles (14.96 by 8.046 km). It moves opposite to Earth's motion, which is unusual to short-period comets considering how far away it is from the sun.
Its orbit period is on average 76 years, which corresponds to an orbital circumference around the sun of about 7.6 billion miles (12.2 billion kilometers). With each orbit around the sun, Halley loses an estimated 3 to 10 feet (1 to 3 meters) of material from the surface of the nucleus. Scientists predict that Halley will make about 1,000 more trips around the sun before it eventually dissipates into dust.

Comet Activity
"Make a Comet" Activity
Materials: Art supplies (styrofoam balls, streamers, glitter, etc.), large yellow ball, diagrams and pictures of the parts of a comet
Begin with showing children a variety of diagrams and pictures of diagrams along with reviewing the parts of the comet (nucleus, coma, hydrogen cloud, dust tail, and gas tail).Children will be instructed to construct these parts of the comet with emphasis on representing the principle parts of a comet that were discussed at the beginning of the lesson. Children could be encouraged to use streamers for tails, glitter for the actual rock, etc.
Children will be asked to tell about their comets and justify why they used different materials to represent principle parts of a comet.
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Thank you for everything- You have inspired us to be our true selves.... Scientists.
For Dr. McLaughlin

Table of Contents
What are comets?.... pages 3-4 News article....page 21
What are comets made of?.... pages 5-6 Resources.... page 22
What are parts of a comet?.... pages 7-8
Where do comets come from?.... pages 9-10
Famous Comets: Halley's Comet.... page 11-12
Comet Activity.... page 13-14
Comet Video Resource... page 15
What is an asteroid?.... page 16
Classifications of asteroids....page 17
Who discovered the asteroid belt?.... page 18
What is the asteroid belt?.... page 19
Children's Book.... page 20
Comets are small celestial bodies that orbit the Sun. They are often referred to as "dirty snowballs."
What are comets?
What are comets? Cont.
They are left over from the formation of stars and planets billions of years ago.

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