quiz

Galactic structure and components.

1. What is a galaxy?

  • A) A large planet
  • B) A group of stars, dust, and gas
  • C) A black hole
  • D) A nebula
B) A group of stars, dust, and gas Explanation

2. Which galactic component contains most of the older stars in a spiral galaxy?

  • A) Spiral arms
  • B) Bulge
  • C) Disk
  • D) Bar
B) Bulge Explanation

3. What holds stars, planets, gas, and dust together in a galaxy?

  • A) Magnetism
  • B) Radiation
  • C) Gravity
  • D) Electromagnetic force
C) Gravity Explanation

4. What feature surrounds the galactic disk and extends far beyond the visible galaxy?

  • A) Dark Matter Halo
  • B) Bulge
  • C) Stellar Disk
  • D) Interstellar Medium
A) Dark Matter Halo Explanation

5. Which component of a galaxy typically contains a supermassive black hole?

  • A) Disk
  • B) Bulge
  • C) Nucleus
  • D) Halo
C) Nucleus Explanation

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