The particles making up the ring of Jupiter are composed of bright, reflective ice.
Indicate whether the statement is true or false
Question 2What do we mean by the period of heavy bombardment in the context of the history of our solar system?
A) the first few hundred million years after the planets formed, which is when most impact craters were formed
B) the time before planetesimals finished accreting into planets, during which many growing planetesimals must have shattered in collisions
C) the time during which heavy elements condensed into rock and metal in the solar nebula
D) the period about 65 million years ago when an impact is thought to have led to the extinction of the dinosaurs
Question 3How much brighter is a Sun-like star than the reflected light from a planet orbiting around it?
A) a hundred times brighter
B) a thousand times brighter
C) ten thousand times brighter
D) a million times brighter
E) a billion times brighter
Question 4If a star is found by spectroscopic observations to be about 500 parsecs distant, its parallax is
A) .2.
B) .5.
C) .02.
D) .002.
E) .005.
Question 5Orbital resonances are a characteristic of some extrasolar systems but are not seen in our solar system.
Indicate whether the statement is true or false
Question 6During the hydrogen shell burning phase:
A) the star grows more luminous.
B) the star becomes less luminous.
C) helium is burning in the core.
D) the core is expanding.
E) hydrogen is burning in the central core.
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