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physical object > natural object > celestial body > nebula > H II region > gaseous nebula > expanding emission nebula > supernova remnant > Puppis A
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Puppis A comparison table
Subject has ejection velocity is part of is a kind of has catalog has wavelength has acronym produce is an instance of has synonym has definition has distance has age has composition
supernova remnant10000 km s-1gasradio sourceradio source catalogradioSNRsynchrotron radiation emission nebulaA gaseous nebula, the expanding shell ejected by a supernova, and deriving its energy (at least in some cases) from the conversion by the remanent neutron star of its rotational energy into a stream of high-energy particles being continually accelerated in the SNR. About 100 SNRs are known in our Galaxy. Supernova remnants are usually powerful radio sources.  enhanced with heavy elements relative to the interstellar medium
X-ray source celestial spherecelestial body X-ray    A class of celestial objects whose dominant mechanism of energy dissipation is through X-ray emission. Galactic X-ray sources appear optically as starlike objects, peculiar in their ultraviolet intensity, variability (on time scales ranging from milliseconds to weeks), and spectral features. All known compact X-ray sources are members of close binary systems; a current popular model is mass accretion onto a compact object from a massive companion. (Four X-ray sources - all variable - are known to be associated with globular clusters.) The 21 known extended X-ray sources associated with clusters of galaxies seem to be clouds of hot gas trapped in the cluster's gravitational field.   
Puppis A10000 km s-1gas radio source catalogX-raySNRsynchrotron radiationX-ray source2U 0821-42A supernova remnant. It is an extended nonthermal radio source, and also a source of soft X-rays.1 to 2 kpc104 to 105 yearsenhanced with heavy elements relative to the interstellar medium

Next supernova remnantVela supernova remnant    Upsupernova remnant, X-ray source    Previous supernova remnantMonoceros Loop