Astronomy View all facts Glossary Help |
physical object > natural object > celestial body > Messier object > Crab Nebula |
Crab Nebula comparison table |
Subject | has purpose | has ejection velocity | is part of | is a kind of | has catalog | has wavelength | has acronym | produce | is an instance of | has synonym | has image | has definition | has distance | has age | has composition | has Messier number |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Messier object | originally to catalog all objects which could be confused with a comet | celestial sphere | celestial body | Messier catalog | an object assigned a number by Charles Messier | from Earth | ||||||||||
supernova remnant | 10000 km s-1 | gas | radio source | radio source catalog | radio | SNR | synchrotron radiation | emission nebula | 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. | enhanced with heavy elements relative to the interstellar medium | ||||||
Crab Nebula | originally to catalog all objects which could be confused with a comet | 10000 km s-1 | gas | Messier catalog | radio | SNR | synchrotron radiation | Messier object | 2U 0531+22 | A chaotic, expanding mass of gas in Taurus, the remnant of a Type I supernova whose light reached Earth in 1054. It is an intense radio source, and its visible light is strongly polarized. It is also a source of X-rays and gamma-rays. Its total mass is about 1 Msun, but the total energy radiated by the Crab is 1037-1038 ergs s-1. It is periodically occulted by the Moon, and every June its radio spectrum is occulted by the solar corona. | 2 kpc | 947 years | enhanced with heavy elements relative to the interstellar medium | 1 |
Next Messier object: Dumbbell Nebula Up: Messier object, supernova remnant Previous Messier object: Andromeda galaxy