Multiple Choice
How do astronomers explain the energetic jets that come out of quasars and active galactic nuclei in opposite directions?
A) the jets are "spit out" from the chaotic accretion disks of supermassive black holes in directions that are perpendicular to the disk
B) the jets are produced when a whole series of massive stars near the galaxy's center explode at the same time as supernovae
C) the jets are connected with the dark matter in distant galaxies; this dark matter is in two large bubbles above and below the galaxy
D) the jets are a kind of astronomical mirage, produced by gravitational lensing by a large mass between us and the quasar
E) there is no current explanation for these jets; they are an unsolved mystery
Section 27.3: Quasars as Probes of Evolution in the Universe
Correct Answer:

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Q3: Astronomers have established that quasars and active
Q4: How are galaxies and quasars related?<br>A) quasars
Q5: What method would astronomers use to find
Q6: Today, astronomers find compelling evidence that the
Q7: Why do astronomers think that there are
Q9: If quasars are at the distances most
Q10: Today we know that what all quasars
Q11: What observation in astronomy, made AFTER the
Q12: The Hubble Space Telescope has enabled astronomers
Q13: How can supermassive black holes at the