One large Milky Way galaxy or many galaxies? 100 years ago, Edwin Hubble settled astronomy's 'Great Debate'
A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...
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What Is a Nebula?
If so, you're in good company, and we've got a gorgeous gallery of nebulae from the world's great ... Orion Nebula. Credit: NASA, ESA, M. Robberto (Space Telescope Science Institute/ESA) and the ...
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One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate’
(THE CONVERSATION) A hundred years ago, astronomer Edwin Hubble dramatically expanded ... Some were gaseous, star-forming regions, such as the Orion nebula, or M42 – the 42nd object in Messier ...