Galaxy Classification Quiz

Categorize: A student observes images of three galaxies and creates the following data table. Which galaxy is most likely an elliptical galaxy, and what evidence best supports this

classification?

• Galaxy 1

• Galaxy 2

• Galaxy 3

An astronomer observes a galaxy with a rounded shape and little evidence of new star formation. Which type of galaxy is the astronomer most likely observing?

• Spiral

• Barred spiral

• Elliptical

• Irregular

In the case study of a newly discovered galaxy, which observations would support classifying it as a spiral galaxy? Choose TWO answers.

• The presence of a central bulge and spiral arms.

• A high number of red stars in the arms.

• A consistent color throughout the galaxy.

• Evidence of active star formation in distinct regions.

• An overall spherical shape without any features.

Select TWO statements correctly describing how astronomers use this data to classify galaxies.

• Galaxies with spiral arms and organized star patterns are classified as spiral galaxies

• Galaxies with smooth, round, or oval shapes are classified as elliptical galaxies

• All galaxies with bright centers must be spiral galaxies

• Galaxies with random star patterns must be irregular galaxies

• The brightness of a galaxy alone determines its classification

Scientists made these observations of a galaxy: