The surface of Venus can be observed with:
A) the Mt. Wilson 100 telescope.
B) radar observations from Arecibo.
C) most amateur telescopes.
D) the Hubble Space Telescope.
E) All of these have provided detailed observations about the surface of our sister planet.
Question 2
Michelson and Morley demonstrated that the speed of light is ________ of the motion of the observer.
Fill in the blank(s) with correct word