Dark nebula

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/dark-nebula

1. How long is the Dark nebula?
2. What is the classification?
3. What is the primary composition?
4. Why do dark nebulae block light from stars?
5. How do scientists find stars inside dark nebulae if they can't see them with a telescope?

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. How long is the Dark nebula?Studied via radio and infrared astronomy due to visible light opacity
2. What is the classification?Absorption nebulae, a type of dense molecular cloud
3. What is the primary composition?Molecular hydrogen (H2) and interstellar dust grains
4. Why do dark nebulae block light from stars?The dust grains in a dark nebula are coated with frozen gases like carbon monoxide and nitrogen, and the cloud is so dense that it absorbs and scatters visible light, so we see a dark silhouette against bright stars.
5. How do scientists find stars inside dark nebulae if they can't see them with a telescope?Scientists use radio and infrared telescopes. Radio waves can travel through the dust and show molecules like CO, while infrared light is re‑emitted by the dust and can reveal hidden young stars.

Interstellar Medium (ISM): The matter and radiation that exist in the space between the stars within a galaxy.
Molecular Hydrogen (H2): The most abundant molecule in the universe, a key component of cold, dense interstellar clouds.
Protostar: A young, embryonic star that is still gathering mass from its parent molecular cloud.