The Hubble tuning fork diagram (figure below)represents an evolutionary diagram of galaxies from elliptical to spiral.
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Q2: Astronomers believe that all giant galaxies probably
Q3: Dark matter consists of material that emits
Q5: Star formation in spiral galaxies happens only
Q6: We know that spiral galaxies contain dark
Q8: Any asymmetry in the gravity field of
Q11: Today only 30 percent of galaxies contain
Q12: Seyfert galaxies are unique because they have
Q13: The 3-dimensional shape of _ is set
Q13: Approximately _ of spiral galaxies are barred.
Q20: We know AGN are about the size
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