The number of comets in the Oort cloud is probably about
A) a thousand.
B) a million.
C) a billion.
D) a trillion.
E) a quintillion.
Correct Answer:
Verified
Q29: Where did comets that are now in
Q30: In order to have a comet named
Q31: Most meteorites are
A)carbon-rich and primitive.
B)rocky and primitive.
C)carbon-rich
Q32: Halley's comet is named after the English
Q33: Comets with extremely elliptical orbits,like comets Hyakutake
Q35: Why won't Pluto collide with Neptune?
A)Pluto's orbit
Q36: Meteorites can come from
A)the cores of asteroids.
B)the
Q37: When do comets generally begin to form
Q38: What is Charon?
A)Pluto's largest moon
B)the largest known
Q39: What characteristic distinguishes a meteorite from a
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