1. The sun's diameter is approximately 1.4 x 10° km, and the Earth's is just under 1.3 x 104 km. The Milky Way is about
9.5 x 10" km across. Which statement is true?
a. The sun is 2 times wider than Earth; the Milky Way is 11
times wider than the sun.
b. The sun is 100 orders of magnitude wider than Earth;
the Milky Way is 100 billion orders of magnitude wider
than the sun.
c. The sun is 2 AU wider than Earth; the Milky Way is 11
light-years wider than the sun.
d. The sun is 2 orders of magnitude wider than Earth; the
Milky Way is 12 orders of magnitude wider than the
sun.