SPACE REVIEW

Which type of galaxy is characterized by a flat, rotating disk containing stars, gas, and dust, and a central concentration of stars known as the bulge?

• Elliptical

• Spiral

• Irregular

• Lenticular

Identify the galaxy type that does not have a distinct regular shape.

• Spiral

• Elliptical

• Irregular

• Barred Spiral

Which of the following best describes the location of Earth's solar system within the Milky Way galaxy?

• At the center

• In the bulge

• In the spiral arms

• In the halo

Compare the life cycle of a massive star to that of a star like the Sun. Which stage is unique to massive stars?

• Red Giant

• Supernova

• White Dwarf

• Main Sequence

Analyze the following statement: "The Big Bang Theory is the most widely accepted explanation for the origin of the universe." Is this statement true or false?

• True

• False

What evidence supports the theory that the universe is expanding?

• The presence of black holes

• The redshift of light from distant galaxies

• The existence of dark matter

• The cosmic microwave background radiation

Which stage in the life cycle of a star is characterized by the fusion of hydrogen into helium?

• Nebula

• Red Giant

• Main Sequence

• White Dwarf

Classify the following galaxy: It has a smooth, featureless light profile and is more three-dimensional than a spiral galaxy.

• Spiral

• Elliptical

• Irregular

• Barred Spiral

Which of the following is a characteristic of irregular galaxies?

• They have a well-defined shape.

• They contain mostly old stars.

• They lack a distinct shape and structure.

• They have a central bulge and spiral arms.

What is the final stage in the life cycle of a low-mass star like the Sun?

• Black Hole

• Neutron Star

• White Dwarf

• Supernova