Although theory says a massive black hole with an accretion disk should be emitting X-rays, many black holes emit:
A) mostly in the infrared.
B) only in the visible.
C) mainly in the gamma.
D) virtually no radiation at all.
E) equally across the entire electromagnetic spectrum.
Question 2The ________ habitable zone is set by the activity of the nucleus on the inside, and the rate of star formation and proper chemistry on the outside.
Fill in the blank(s) with correct word
Question 3This design combines the radiation from two different telescopes to greatly enhance resolution via computer synthesis.
A) Cassegrain reflector
B) Newtonian reflector
C) prime focus reflector
D) refractor
E) interferometer
Question 4Which of the following is not a line of evidence supporting the hypothesis that our Moon formed as a result of a giant impact?
A) The Pacific Ocean appears to be a large craterprobably the one made by the giant impact.
B) Computer simulations show that the Moon could really have formed in this way.
C) The Moon's average density suggests it is made of rock much more like that of the Earth's outer layers than that of Earth as a whole.
D) The Moon has a much smaller proportion of easily vaporized materials than Earth.
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