Radio continuum structure of the Orion Nebula

We have imaged the large-scale radio continuum structure in the Orion regio n with the Very Large Array at 330 MHz. Arcminute-resolution morphology of the extended emission in the H II regions M42 and M43 (NGC 1976 and NGC 198 2) and in the NGC 1973-75-77 nebulosity to the north are presented. A low s urface brightness thermal radio halo is detected in the H II region M42: co mparison with an optical photograph indicates that the radio emission disti nguishes optical emission structures from reflection nebulosities. In NGC 1 977 we have discovered a compact, steep-spectrum radio source coincident wi th a bright optical rim.