Astronomy Quiz

What is the term for the brightness of a star as seen from Earth?

• Luminosity

• Apparent brightness

• Spectroscopic parallax

• Emission nebula

Which of the following is the correct order of stellar classification from hottest to coolest?

• M, K, G, F, A, B, O

• O, B, A, F, G, K, M

• G, F, A, B, O, M, K

• B, A, F, G, K, M, O

What diagram is used to classify stars based on their luminosity and temperature?

• Spectroscopic Parallax

• HR Diagram

• Galactic Core

• Cepheid Variables

What is the term for the process where one galaxy merges with another?

• Galactic halo

• Galactic core

• Galactic cannibalism

• Spiral arms

Which law relates the velocity of a galaxy with redshifting to its distance from Earth?

• Leavitt’s law

• Hubble’s law

• Big Bang theory

• Spectroscopic Parallax

What is the term for a region around a star where conditions may be suitable for life?

• Dark nebula

• Emission nebula

• Habitable zone

• Galactic halo

The idea that the universe began as an infinitely small, hot, and dense point, which rapidly expanded and continued to stretch over 13.7 billion years

• Galactic core

• Big Bang theory

• Cepheid variables

• Galactic halo

What are Cepheid variables used for in astronomy?

• Measuring star temperature

• Determining distances

• Classifying galaxies

• Identifying black holes

What is the term for a massive explosion that occurs at the end of a star's life cycle?

• Supernova

• Dark nebula

• Emission nebula

• Galactic core

What is the main component of the Milky Way's structure?

• Galactic halo

• Spiral arms

• Emission nebula

• Dark nebula