Illustration showing the constellation, Orion; 1809

Illustration showing the constellation, Orion; 1809. At this date it was thought that with better instruments it might be possible to resolve such patches into separate stars. It was not until spectroscopy was developed that it was discovered that they consisted of glowing gas

1809 Consisted Constellation Developed Discovered Glowing Might Patches Possible Resolve Separate Spectroscopy

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