Gravity in Space

What You'll Learn

Nebulae are clouds of gas and dust in space where new stars are born. When gravity causes a nebula to collapse, it heats up and nuclear fusion begins, forming a star.

Key Words

comet
solar system

Steps

Step 1 — Read

Read and learn: Nebulae are clouds of gas and dust in space where new stars are born. When gravity causes a nebula to collapse, it heats up and nuclear fusion begins, forming a star.

Step 2 — Do

Build your model using the materials provided.

Step 3 — Observe

Look for patterns in your observations.

Step 4 — Record

Make a graph or chart showing your results.

Check Your Understanding

Question 1

1 of 3

What keeps planets in orbit around the sun?