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The top documents tagged [sc galaxies]
Chapter 16: Other Galaxies. WHAT DO YOU THINK? Do all galaxies have spiral arms? Are galaxies isolated objects? Are all other galaxies moving away from
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Galaxies - Chapter 24 vs. 1. First spiral nebula found in 1845 by the Earl of Rosse. Speculated it was beyond our Galaxy. 1920 - "Great Debate" between
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Historical background Until the 1920's it was believed that our Milky Way was all there was to the universe. As early as the 18th century, the philosopher
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Galaxies. Hubble’s Galaxy Classification American astronomer Edwin Hubble was the first to categorize galaxies in a comprehensive way. His observations
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