Red and orange stars are found evenly spread throughout the galactic disk, but blue stars are typically found ________.
A) only in the central bulge B) also evenly spread throughout the galactic disk
C) only in or near star-forming clouds D) in the halo
Question 2
The total number of comets orbiting the Sun is estimated to be about ________.
A) 100,000 B) 1 trillion C) 1,000 D) 1 million
