Galaxies: Islands of Stars

What You'll Learn

Galaxies are enormous collections of stars, gas, and dust held together by gravity. Our Milky Way galaxy contains hundreds of billions of stars and is a spiral galaxy.

Key Words

inner planets
outer planets

Materials Needed

foil
scissors
flashlight
ball (Earth)
small ball (moon)

Safety First

Dispose of materials properly after the experiment.

Steps

Step 1 — Read

Read and learn: Galaxies are enormous collections of stars, gas, and dust held together by gravity. Our Milky Way galaxy contains hundreds of billions of stars and is a spiral galaxy.

Step 2 — Do

Compare your results with a partner.

Step 3 — Observe

Observe what happens and describe it in detail.

Step 4 — Record

Record your observations in your science journal.

Check Your Understanding

Question 1

1 of 3

What is a galaxy?