the universe Flashcards
What are the three main types of galaxies?
Elliptical, spiral, and irregular galaxies.
True or False: Spiral galaxies have a distinct central bulge and spiral arms.
True.
Fill in the blank: The most common type of galaxy in the universe is the __________ galaxy.
spiral.
What shape do elliptical galaxies typically have?
They have an oval or elliptical shape.
Multiple Choice: Which type of galaxy is characterized by a lack of defined structure?
Irregular galaxy.
What are the two main subtypes of spiral galaxies?
Normal spirals and barred spirals.
True or False: Elliptical galaxies contain a lot of gas and dust.
False.
What is the primary component of elliptical galaxies?
Older stars.
Fill in the blank: Irregular galaxies often contain a significant amount of __________.
gas and dust.
Which galaxy type is often associated with star formation?
Spiral galaxies.
Multiple Choice: Which of the following is NOT a characteristic of elliptical galaxies?
Presence of spiral arms.
What is the Hubble classification system used for?
To categorize galaxies based on their shapes.
True or False: Irregular galaxies can evolve into spiral galaxies over time.
True.
What type of galaxy is the Milky Way?
Spiral galaxy.
Fill in the blank: __________ galaxies are typically older and have less interstellar matter.
Elliptical.
What type of galaxy is often rich in young stars?
Spiral galaxies.
Multiple Choice: Which type of galaxy is known for its irregular shape?
Irregular galaxy.
What is a key feature of barred spiral galaxies?
They have a central bar structure made of stars.
True or False: All galaxies can be classified into one of the three main types.
True.
Fill in the blank: The __________ galaxy type is often found in clusters.
elliptical.
What distinguishes normal spiral galaxies from barred spiral galaxies?
Normal spirals lack the central bar structure.
Multiple Choice: Which type of galaxy has the most diverse range of shapes?
Irregular galaxy.
What is the role of dark matter in galaxies?
It influences their formation and rotation.
True or False: Spiral galaxies are more likely to have active star formation than elliptical galaxies.
True.
