This dimension groups celestial objects by the constellation in which they appear in the sky. Wikipedia notes that in 1922 "the International Astronomical Union (IAU) formally accepted the modern list of 88 constellations," each covering its own fixed region of the sky. Browsing this way shows every notable object found within one constellation.
Facts
Comparison
Field Origin Era Constellation
Sources
1. Wikipedia: Nebula
Wikimedia FoundationNebula, Observational history section, Messier catalogue sentenceQuote, Nebula, Observational history section, Messier catalogue sentence
Charles Messier then compiled a catalog of 103 nebulae (now called Messier objects, which included what are now known to be galaxies) by 1781
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