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ProplydProto Planetary Disk (astrophysicist C. Robert O'Dell of Rice University)
References in periodicals archive ?
It appeared rather similar to the proplyds already mentioned, but this time much more violent.
The most striking proplyd is one seen only in silhouette against the background of the nebula.
Early evidence that proplyds exist in Orion includes some narrow-band images of the Trapezium from 1979 that show six unresolved stars with only emission lines.