Download Study Guide for Solar System Test part 2 stars

Study Guide for Solar System Test (part 2)
Test on February 6th
Why do stars seem to twinkle?
What is the difference between a red
star and a blue star?
What is meant by the phrase “the life
cycle of a star”?
How is our sun described in terms of
heat and size?
Why are constellations useful?
Why do the star patterns we see in
the night sky seem to move?
Which planets are visible with the
unaided eye (without a telescope)?
Who was one of the first people to use
a telescope to study the sky?
Which star is most often used to help
us find a direction and why?
Because the light is traveling to our eyes from very
far away
A red star is a cool star, a yellow star is a medium hot
star, and a blue star is very hot
A star does not last forever, it has a beginning when it
is formed, it shines for billions of years, then it begins
to cool and finally “dies”.
Our sun is a medium sized, medium hot, yellow star
They act as landmarks in the night sky, and have been
used for hundreds of years to help people find their
way. They also helped people in ancient times keep
track of the seasons, because different constellations
could only be seen at certain times of the year.
As the earth orbits the sun we see different parts of
the galaxy and our position in space changes. It looks
like the stars are moving, but actually it is the earth
that is moving.
Mercury, Venus, Mars, Jupiter, and Saturn.
Galileo Galilei
The North Star, or Polaris, is a star that always points
north. Even though the earth moves, this star is
always pointing North.