Two stars, Fred and Barney, are of the same size. Fred has spectral type F, while Barney has spectral type B. Which one is more luminous? What are their relative locations on the HR diagram?
What will be an ideal response?
Question 2
Which of the following statements are not falsiable? Being falsiable means that, in principle, it can be shown to be false by observations or experiments.
A) Human beings were created by God.
B) The Sun is at the center of the solar system.
C) The observable universe contains about 100 billion galaxies.
D) The Earth is at the center of the solar system.
E) The chemical content of the universe is mostly hydrogen and helium.