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The Crab Nebula, and the Crab Pulsar within it, is an intense space X-ray source. It is used as a standard candle in the calibration procedure of X-ray instruments in space. However, because of the Crab Nebula's variable intensity at different X-ray energies, conversion of the Crab to another units depends on the X-ray energy range of interest.
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 ...
Pulsar [3] Lich Pulsar (PSR B1257+12) 10 Pulsar: Orbited by three planets. [4] Crab Pulsar (PSR B0531+21) 10 Relatively young at 7200 (or 970 relative to Earth) years old as of May 2024. [5] Geminga: 10 [6] XTE J1739-285: 10.9 Pulsar (quark star?) [7] PSR J1906+0746: 11.99 – 12.85 Pulsar [8] PSR J2043+1711: 12.13 – 12.96 [8] PSR J1933 ...
Crab (unit) Crab Pulsar; S. SN 1054; Media in category "Crab Nebula" This category contains only the following file. Crab Nebula.jpg 3,864 × 3,864; 13.84 MB
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 ]
Vietorientalia rubra, formerly known as Hainanpotamon rubrum and Orientalia rubra, is an extant species of freshwater crab native to Vietnam. [1] Although many of the individuals currently for sale are wild caught, there has been some success with breeding these crabs in captivity.
PSR B1919+21 is a pulsar with a period of 1.3373 seconds [4] and a pulse width of 0.04 seconds. Discovered by Jocelyn Bell Burnell on 28 November 1967, it is the first discovered radio pulsar. [ 5 ] The power and regularity of the signals were briefly thought to resemble an extraterrestrial beacon , leading the source to be nicknamed LGM ...
Potamon fluviatile is a freshwater crab found in or near wooded streams, rivers and lakes in Southern Europe.It is an omnivore with broad ecological tolerances, and adults typically reach 50 mm (2 in) in size during their 10–12 year lifespan.