Observations indicate that galaxies arose from the splitting of large gas clouds into smaller gas clouds.
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Q9: The Tully-Fisher relation is mainly used for
Q10: The acronym AGN stands for active galactic
Q11: Debates about the nature of so-called "spiral
Q12: Gravitational lensing involves using a special type
Q13: Lenticular galaxies are intermediate between spiral and
Q15: Starburst galaxies occur when a rapid and
Q16: A barred spiral galaxy has young,hot,blue stars
Q17: The Milky Way Galaxy is the only
Q18: A rich cluster contains hundreds or even
Q19: In general,elliptical galaxies are sites of active
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