When we speak of the large-scale structure of the universe, we mean ________.
A) the structure of any large galaxy
B) the overall shape of the observable universe
C) the overall arrangement of galaxies, clusters of galaxies, and superclusters in the universe
D) the structure of any individual cluster of galaxies
Question 2
The tidal stresses that create Io's volcanism come from Jupiter and
A) Titan. B) the Sun. C) Callisto. D) Europa. E) Ganymede.