NGC 634

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/ngc-634

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 galaxy classification?Sc spiral galaxy
2. What is the redshift (z)?0.016788
3. What type of galaxy is NGC 634?NGC 634 is an Sc‑type spiral galaxy, meaning it has loosely wound spiral arms that extend from a small central bulge.
4. Why do the spiral arms of NGC 634 look bright?The arms contain young, hot blue stars and H II regions where new stars are born, making them glow brightly.

Morphology: The study of the form and structure of galaxies and other celestial objects.
H II Region: A cloud of ionized hydrogen gas where new stars are actively forming.
Redshift: The stretching of light waves from objects moving away from us, indicating cosmic expansion.
Hubble's Law: The observation that galaxies are moving away from Earth at speeds proportional to their distance.