Observations Indicate That BL Lacertae Objects Are

question 90

Multiple Choice

Observations indicate that BL Lacertae objects are

• A) quasars colliding with smaller galaxies and initiating vigorous star formation.
• B) black holes in binary star systems, where matter pulled from the companion stars forms a hot accretion disk around the black holes.
• C) distant spiral galaxies with high rates of supernova explosions.
• D) radio galaxies whose jets and radio lobes point almost directly at Earth.

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