Nebulae: Star Nurseries

What You'll Learn

Gravity keeps planets in orbit around the sun and moons in orbit around planets. The strength of gravity depends on mass and distance between objects.

Key Words

gravity
light-year

Steps

Step 1 — Read

Read the introduction and identify the main idea of this lesson.

Step 2 — Do

Research and create a poster about one constellation. Include its stars, mythology, and when it's visible in your area.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Check Your Understanding

Question 1

1 of 3

What is a comet?