The Milky Way can be classified as which type of galaxy? (1 point)
• spiral
• irregular
• circular
• elliptical
spiral
What is the name of the supercluster in which the Local Group is located? (1 point)
• Virgo
• Corona Borealis
• Hercules
• Centaurus
Virgo
Approximately which percentage of the universe do galaxies occupy? (1 point)
10%
20%
5%
2%
Approximately 2%
To determine the classification of the Milky Way, let's discuss the characteristics of each type of galaxy and see which one best describes our own.
1. Spiral Galaxy: A spiral galaxy is characterized by a central bulge and spiral arms that extend outward. These arms are composed of stars, gas, and dust. Spiral galaxies often have a disk-like structure. Examples of spiral galaxies include the Andromeda Galaxy and the Whirlpool Galaxy.
2. Irregular Galaxy: An irregular galaxy does not have a defined shape or structure. They often appear chaotic, with no distinct symmetry. Irregular galaxies can be irregular due to their interaction with other galaxies or gravitational disturbances. The Large Magellanic Cloud is an example of an irregular galaxy.
3. Circular Galaxy: The term "circular" is not a recognized classification of galaxies. Galaxies come in various shapes and structures.
4. Elliptical Galaxy: An elliptical galaxy is smooth and featureless in appearance, with an oval or elongated shape. They lack the spiral arms or disk-like structure found in spiral galaxies. Elliptical galaxies are composed of older stars and are often found in galaxy clusters. Examples of elliptical galaxies include M87 and NGC 4472.
Based on these classifications, the Milky Way is classified as a spiral galaxy. It has a bulge in the center and spiral arms that extend outward. We determine this by observing the structure and shape of the Milky Way, as well as the presence of its spiral arms. Therefore, the correct answer is:
• Spiral