Dead disk

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/dead-disk

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the scientific name?Debris disk (common term for evolved dead disks)
2. What is the primary composition?Dust generated by collisions of planetesimals
3. How do dead disks form?When a young star is born, a big disk of gas and dust surrounds it. Over millions of years, the star’s light and winds push the gas away, and the remaining dust is made by collisions of big rocks. This leaves a thin ring of dust called a dead disk.
4. Why are dead disks important to scientists?They let astronomers see how planets grow and how a star’s system changes. By studying the dust rings, scientists can guess where hidden planets might be and learn about the early materials that made our own Earth.

Hierarchical Accretion: The process where small particles gradually combine to form larger objects.
Planetesimals: Small celestial bodies that are thought to have formed from the accretion of dust and gas in the early solar system.
Astrobiology: The study of the origin, evolution, distribution, and future of life in the universe.