A key piece of evidence that leads astronomers to conclude that most galaxies include a supermassive black hole in the center is that ____.
a. high-speed disks of gas are observed in the central parsecs of other galaxies
b. streamers of gas from stars that have been torn apart are detected in most galactic centers
c. stars near the center of other galaxies are orbiting more rapidly than expected
d. the mass of all galaxies is much more than expected based on the visible material in the galaxy
e. the disks of all spiral galaxies rotate more quickly than Kepler's laws predict
Question 2
CCD images captured from telescopes are often ____ to be stored in a computer's memory for later analysis.
a. pixilated
b. compounded
c. falsely colored
d. divided into smaller images
e. converted to numerical data
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