If Quasars Are at the Distances Most Astronomers Believe They

question 9

Multiple Choice

If quasars are at the distances most astronomers believe they are, then (for the most luminous ones) their luminosities must be:

• A) like the Sun
• B) like the combined luminosity of a cluster of a hundred stars
• C) much fainter than the Sun
• D) like the accretion disk of a black hole formed from a single star (like Cygnus X-1)
• E) like the combined luminosity of a hundred trillion (10¹⁴) Suns

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The lowest legal hourly pay that workers can be paid by their employers, set by government policy.

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