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The Crab Pulsar was the first pulsar for which the spin-down limit was broken using several months of data of the LIGO observatory. Most pulsars do not rotate at constant rotation frequency, but can be observed to slow down at a very slow rate (3.7 × 10 −10 Hz/s in case of the Crab). This spin-down can be explained as a loss of rotation ...
The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus.The common name comes from a drawing that somewhat resembled a crab with arms produced by William Parsons, 3rd Earl of Rosse, in 1842 or 1843 using a 36-inch (91 cm) telescope. [6]
Pulsar wind nebulae evolve through various phases. [2] [5] New pulsar wind nebulae appear soon after a pulsar's creation, and typically sit inside a supernova remnant, for example the Crab Nebula, [6] or the nebula within the large Vela Supernova Remnant. [7] As the pulsar wind nebula ages, the supernova remnant dissipates and disappears.
Tail wagging has long been associated with a pup's mood, but the fascinating -- and often telling -- things about the appendage don't stop there. Here are 10 things you didn't know about dogs' tails.
A L. beagle washed ashore off Western Australia's south coast and was found by a Danish family, who sent it to the Western Australia Museum for identification. Andrew Hosie, a crustacean and worm curator at the Western Australian Museum, and Colin McLay, a marine biologist affiliated with the University of Canterbury in New Zealand, then described the crab as a new species, one of the three ...
The_Crab_Nebula_NASA.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 3 min 42 s, 640 × 360 pixels, 558 kbps overall, file size: 14.78 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Dromiidae is a family of crabs, [2] often referred to as sponge crabs.They are small or medium-sized crabs which get their name from the ability to shape a living sponge into a portable shelter for themselves. [3]
Crab-plover eating a crab. The crab-plover is unusual for waders in that it nests in burrows in sandy banks. In the Red Sea region, the breeding season begins around the middle of May. [4] It is a colonial breeder, nesting in colonies as large 1500 pairs. It lays one white egg, occasionally two, which are large for its body size.