According to the nebular theory, what is the asteroid belt?
A) It is material left over from the interstellar cloud that never contracted with the rest of the gases to form the solar nebula.
B) It consists of planetesimals that formed beyond Neptune's orbit and never accreted to form a planet.
C) It consists of objects that fragmented from the Sun during a catastrophic collision early in the formation of the solar system.
D) It consists of planetesimals that formed between the orbits of Mars and Jupiter but which Jupiter's gravity prevented from becoming a planet.
E) It consists of planetesimals formed in the outer solar system that were flung into distant orbits by encounters with the jovian planets.
D) It consists of planetesimals that formed between the orbits of Mars and Jupiter but which Jupiter's gravity prevented from becoming a planet.
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Describe the three sources of internal heat of the terrestrial planets.
Fill in the blank(s) with the appropriate word(s).
A bass fiddle is louder than a harp because of its
A) thicker strings. B) sounding board. C) lower pitch. D) all of the above E) none of the above
A quantity that has only a magnitude but no direction associated with it is called a __________
Fill in the blank(s) with correct word
Which stellar population has highly elliptical orbits?
a. Pop I extreme b. Pop I intermediate c. Pop II intermediate d. Pop II extreme