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physical object > natural object > celestial body > nebula > H II region > gaseous nebula > expanding emission nebula > supernova remnant > W44 |
W44 comparison table |
Subject | is a kind of | is an instance of | has definition | has distance |
---|---|---|---|---|
supernova remnant | radio source | A 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. | ||
W44 | supernova remnant | A radio source. It is a supernova remnant less than 0°.5 from the galactic plane. | 3 kpc |
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