How Far Is a Light-Year? (Part 2)

What You'll Learn

Light from the sun takes about 8 minutes to reach Earth. A light-year is the distance light travels in one year—about 9.5 trillion kilometers.

Key Words

outer planets
atmosphere
satellite

Steps

Step 1 — Read

Read and learn: Light from the sun takes about 8 minutes to reach Earth. A light-year is the distance light travels in one year—about 9.5 trillion kilometers.

Step 2 — Do

Follow the procedure carefully, step by step.

Step 3 — Observe

Use your senses (except taste) to describe what you notice.

Step 4 — Record

Write a summary of your findings in 3-5 sentences.

Check Your Understanding

Question 1

1 of 3

Which planet is known as the Red Planet?