Actually, the group of bananas commonly referred to as a bunch at the store is actually a hand, or less commonly tier.
PSR B1509-58 - X-rays from Chandra are gold; Infrared from WISE in red, green and blue/max. A pulsar (from pulse and -ar as in quasar) is a highly magnetized, rotating neutron star or white dwarf, that emits a beam of electromagnetic radiation. This radiation can be observed only when the beam of emission is pointing toward Earth (much like the way a lighthouse can be seen only when the light is pointed in the direction of an observer), and is responsible for the pulsed appearance of emission.
They are usually detected through their radio emissions. However, some pulsars, in addition to their radio emissions, emit pulses in the visible light, x-ray and even gamma ray wavelengths. NASAâs Fermi Gamma Ray Space Telescope recently detected a pulsar sending a beam of radiation in the direction of Earth about three times every second. This beam consists solely of gamma rays, setting this pulsar apart from all previously detected pulsars.