Why isn't space expanding within systems such as our solar system or the Milky Way?
A. Hubble's law of expansion applies only to the space between galaxies.
B. We are so close to these systems that we don't observe their expansion.
C. The universe is not old enough yet for these objects to begin their expansion.
D. Their gravity is strong enough to hold them together against the expansion of the universe.
Answer:D
Why isn't space expanding within systems such as our solar system or the Milky Way?
A. Hubble's law of expansion applies only to the space between galaxies. B. We are so close to these systems that we don't observe their expansion. C. The universe is not old enough yet for these objects to begin their expansion. D. Their gravity is strong enough to hold them together against the expansion of the universe.