Galaxies and Clusters – MCQs

1. What is a galaxy?
  • A single star with planets
  • A massive system of stars, gas, dust, and dark matter bound by gravity
  • A cloud of interstellar gas
  • A cluster of black holes
2. Which galaxy do we live in?
  • Andromeda Galaxy
  • Milky Way Galaxy
  • Triangulum Galaxy
  • Sombrero Galaxy
3. What is the shape of the Milky Way galaxy?
  • Elliptical
  • Irregular
  • Spiral
  • Spherical
4. What is the closest large galaxy to the Milky Way?
  • Triangulum Galaxy
  • Andromeda Galaxy (M31)
  • Whirlpool Galaxy
  • Pinwheel Galaxy
5. What is a galaxy cluster?
  • A group of planets
  • A collection of galaxies bound together by gravity
  • A single massive star
  • A nebula with young stars
6. Which type of galaxy is the most common in the universe?
  • Spiral
  • Elliptical
  • Irregular
  • Lenticular
7. What is the name of the supercluster that includes the Milky Way?
  • Coma Supercluster
  • Laniakea Supercluster
  • Virgo Supercluster
  • Perseus-Pisces Supercluster
8. What is the main force that holds galaxies together in a cluster?
  • Electromagnetic force
  • Gravity
  • Nuclear force
  • Dark energy
9. Which galaxy is known for its prominent dust lanes and bright nucleus?
  • Milky Way
  • Sombrero Galaxy (M104)
  • Andromeda
  • Whirlpool Galaxy
10. What is the Local Group?
  • A cluster of black holes
  • A group of about 50 galaxies, including the Milky Way and Andromeda
  • A type of star cluster
  • A nebula formation
11. What is the name of the largest known galaxy in the universe?
  • Milky Way
  • Andromeda
  • IC 1101
  • Messier 87
12. What is the approximate number of galaxies in the observable universe?
  • 100 million
  • 1 billion
  • 2 trillion
  • 10 trillion