Trifid nebula(redirected from Triffid Nebula)
Trifid nebula(triff -id) (M20; NGC 6514) An emission nebula about 2000 parsecs away in the direction of Sagittarius. There is dark matter associated with the nebula.
Trifid nebula[′trī‚fid ′neb·yə·lə]
An emission nebula in Sagittarius that consists mostly of hydrogen ionized by hot, young stars, and displays dark lanes formed by dust.