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— by Joseph D. Schulman —

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  • Home
  • About
    • About Me
    • The Schulman Telescope
    • Contact
  • Galaxies
  • Nebulas
  • Stars
  • Other Celestial Objects
    • Comets
    • Planetary Nebulas
    • Planets & Moon
    • Supernovas
    • Unclassified Objects

Messier 20 and Messier 21 – Star Cluster and Emission Nebula

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Messier 20 (M20) and Messier 21 (M21) are a star cluster and an emission nebula in the Sagittarius constellation.

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