1. Which of the following best describes the
most widely accepted theory of the solar
A. A small star grew as it consumed
comets, eventually becoming large
enough to ignite fusion reactions
and attract planetary bodies.
B. A star existing within the Milky
Way Galaxy pulled in comets and
interstellar dust traveling through
its gravitational field.
C. The remnant elements of the
explosion of a massive star
coalesced, forming planets that
circled the hydrogen core of the
D. A spinning cloud of interstellar
dust and gas shrank under the force
of gravity, producing a central star
and revolving planetesimals.