Objective
Compare the size and distance of objects within systems in the universe.
Layered Book Assignment
Using your fact sheet, made a layered-book identifying the three types of
galaxies.
1. Make a three-layer book. You make this by using two sheets of
paper. This will give you three tabs.
a
b
c
d
a. Stack two sheets of paper (8½ x 11), and place the
back sheet one inch higher than the front sheet.
b. Bring the bottom of both sheets upward and align the
edges so that all the layers or tabs are the same
distance apart.
c. When all tabs are an equal distance apart, fold the
papers and crease well.
d. Open the papers and glue them together along the
valley/center fold.
2. Label your three-layer book.
a. Title the layered book “Types of Galaxies.”
b. Title the first tab “Elliptical Galaxies.”
Draw a picture of an elliptical galaxy and
provide facts about elliptical galaxies.
c. Title the second tab “Irregular Galaxies.”
Draw a picture of an irregular galaxy and
provide facts about irregular galaxies.
d. Title the third tab “Spiral Galaxies.”
Draw a picture of a spiral galaxy and
provide facts about spiral galaxies.
Objective
Compare the size and distance of objects within systems in the universe.
Comparison of Spiral, Elliptical, and Irregular Galaxies
Fact Sheet
Spiral
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Very large galaxy.
Composed of stars, gas, and dust.
Pinwheel.
Gravity holds galaxy together.
Have a bulge and thin disk; halo is present.
Middle-aged galaxy.
Elliptical
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Small to large galaxy.
Composed of stars, little gas and dust.
Round to oval.
Gravity holds galaxy together.
Have a bulge but no disk is present; has a halo.
Older galaxy.
Irregular
 Large to small galaxy.
 Composed of stars, a large amount of gas and
dust.
 No regular shape.
 Gravity holds galaxy together.
 May have a disk or bulge or they may be
forming; a halo is present.
 Young galaxy.