Linked from
The 15 pages that link to Crab Nebula, each with the reason it gives.
Messier catalogBroader topic: M1 is the catalog’s first entry and a remnant of an exploded star.
NebulaBroader topic: It is a well-studied nebula powered by a pulsar left after a supernova.
Crab PulsarRelated: The Crab Pulsar lies at its center and supplies energy to its expanding debris.
Messier objectBroader topic: It is the first object in Messier’s catalogue.
Argon compoundsBroader topic: Astronomers detected argon hydride ions in its hydrogen-rich regions.
SN 1054Broader topic: It is the expanding debris left by SN 1054.
Cygnus LoopCompared with: Unlike the Cygnus Loop’s broad shell, the Crab is a pulsar-powered nebula.