Download Planets and the Sun How Do We Size Up?

Planets and the Sun
How Do We Size Up?
Seventh Grade Science
Size
• In order to determine size, we need a point
of reference
• A jet flying in the sky appears to be small due
to distance, on the ground, it is very big
• How does the Earth compare in size to the
rest of the solar system?
Our Solar System
The Sun is a Star
• The sun is an average sized star
• Over one million Earths can fit into the sun
• All the stars you see in the night sky are tiny
because they are so far away
• Most of the stars are larger than our sun!!
Types of Stars
• Stars come in different sizes
• Lets take a journey to see how we compare to
the rest of the objects in our solar system and
our galaxy
• https://www.youtube.com/watch?v=US_O0uK
5piA
Early Astronomers
• Looked into the night sky and charted what
they saw
• They only looked with the unaided eye
• Examine the Power Point on Early
Astronomers to find out about their theories
of the solar system